Wonder if you replace your build.prop contents with the following, would your tablet perform smoother?:
# begin build properties ZT282 C94
# autogenerated by buildinfo.sh
ro.build.id=ICS.f04ref.20120204
ro.build.display.id=4.0.3 ZeniBasic v1.3 12/12/13
ro.build.version.incremental=eng.root.20120204.165424
ro.build.version.sdk=15
ro.build.version.codename=REL
ro.build.version.release=4.0.3
ro.build.date=Sat Mar 3 09:12:17 CST 2012
ro.build.date.utc=1330737137
ro.build.type=eng
ro.build.user=root
ro.build.host=android
ro.build.tags=test-keys
ro.product.model=Z282 C94
ro.product.brand=samsung
ro.product.name=GT-I9100
ro.product.device=GT-I9100
ro.product.board=GT-I9100
ro.product.cpu.abi=armeabi-v7a
ro.product.cpu.abi2=armeabi
ro.product.manufacturer=samsung
ro.product.locale.language=en
ro.product.locale.region=US
ro.wifi.channels=14
ro.board.platform=exDroid
# ro.build.product is obsolete; use ro.product.device
ro.build.product=f04ref
# Do not try to parse ro.build.description or .fingerprint
ro.build.description=GT-I9100-eng 4.0.3 IML74K 20120303 test-keys eng.root.20120204.165424 test-keys
ro.build.fingerprint=samsung/GT-I9100/GT-I9100:4.0.3/IML74K/20120303:eng/test-keys
ro.build.characteristics=tablet
# end build properties
# system.prop for M1 reference board
# This overrides settings in the products/generic/system.prop file
#
#rild.libpath=/system/lib/libreference-ril.so
#rild.libargs=-d /dev/ttyS0
ro.sf.lcd_density=160
keyguard.no_require_sim=1
#set keyguard.enable=false to disable keyguard
keyguard.enable=true
ro.statusbar.widget=true
ro.statusbar.button=true
ro.statusbar.yearmonthdayweek=true
# Status bar customization
ro.statusbar.widget.power=true
#
persist.sys.storage_preload=1
#
wifi.interface=wlan0
ro.ethernet.interface=eth0
mobiledata.interfaces=pdp0,wlan0,gprs,ppp0
# Time between scans in seconds. Keep it high to minimize battery drain.
wifi.supplicant_scan_interval=200
#
# Wireless speed increase
net.tcp.buffersize.default=4096,87380,110208,4096,16384,256960
net.tcp.buffersize.wifi=524288,1048576,2097152,262144,524288,1048576
net.tcp.buffersize.umts=4094,87380,110208,4096,16384,256960
net.tcp.buffersize.gprs=4096,87380,4096,16384,256960
net.tcp.buffersize.edge=4093,26280,35040,4096,16384,35040
net.tcp.buffersize.evdo_b=4096,87380,4096,16384,256960
net.tcp.buffersize.lte=524288,1048576,2097152,262144,524288,1048576
net.tcp.buffersize.umts=4096,87380,4096,16384,256960
net.tcp.buffersize.hspa=4094,87380,262144,4096,16384,262144
#
# 3G Signal Optimization Tweaks
ro.telephony.ril_class=
ro.ril.hsxpa=3
# ro.ril.gprsclass=10
ro.ril.gprsclass=12
ro.ril.hep=1
ro.ril.enable.dtm=1
# ro.ril.hsdpa.category=10
ro.ril.hsdpa.category=16
ro.ril.enable.a53=1
ro.ril.enable.3g.prefix=1
ro.ril.htcmaskw1.bitmask=4294967295
ro.ril.htcmaskw1=14449
# ro.ril.hsupa.category=5
ro.ril.hsupa.category=8
#
#alsa.mixer.playback.master=DAC2 Analog
#alsa.mixer.capture.master=Analog
#configure the Dalvik heap for a standard tablet device.
#frameworks/base/build/tablet-dalvik-heap.mk
dalvik.vm.dexopt-data-only=1
dalvik.vm.heapstartsize=10m
dalvik.vm.heapgrowthlimit=96m
dalvik.vm.heapsize=512m
dalvik.vm.checkjni=false
#Dalvik.Optimization
dalvik.vm.verify-bytecode=true
# dalvik.vm.dexopt-flags= (v=n,o=v or m=y or m=v,o=y)
dalvik.vm.dexopt-flags=m=v,o=y
dalvik.vm.execution-mode=int:jit
dalvik.vm.lockprof.threshold=500
# dalvik.vm.jniopts=forcecopy
#
# Disable un-supported Android feature
hw.nopm=false
hw.nobattery=false
hw.nophone=false
hw.novibrate=true
hw.istablet=true
hw.cameras=1
hw.hasethernet=true
hw.hasdata=true
ro.hardware=amlogic
ro.platform.has.touch=true
# Wi-Fi sleep policy
ro.platform.has.sleeppolicy=false
#set to 0 temporarily so touch works without other changes
ro.sf.hwrotation=270
#0~7 You are required to get the correct install direction according the sensor placement on target board
ro.sf.gsensorposition=4
ro.sf.ecompassposition=4
allow_all_orientations=1
#
# Use OSD2 mouse patch
ro.ui.cursor=1
#Faster Scrolling
windowsmgr.max_events_per_sec=60
ro.min_pointer_dur=8
ro.max.fling_velocity=12000
ro.min.fling_velocity=8000
#
#Render user interface with the GPU
debug.sf.hw=1
ro.config.disable.hw_accel=false
persist.sys.ui.hw=1
debug.egl.hw=1
debug.composition.type=gpu
#Force homelauncher into memory (disable =0)
ro.HOME_APP_ADJ=1
#
#Overall performance/responsiveness increase
debug.performance.tuning=1
#Video acceleration enabled
video.accelerate.hw=1
#help to free up unused ram
# persist.sys.purgeable_assets=1
#
# Enable 32-bit OSD
sys.fb.bits=32
#
# Disable GPS
gps.enable=true
#
# Enable player buildin
media.amsuperplayer.enable=true
media.amplayer.enable-codecs=asf,wav,aac,mp3,m4a,ape,flac,alac
media.amplayer.enable=true
media.amsuperplayer.m4aplayer=STAGEFRIGHT_PLAYER
media.amsuperplayer.defplayer=PV_PLAYER
media.amplayer.thumbnail=true
media.amplayer.widevineenable=true
#
#Better video streaming
media.stagefright.enable-player=true
media.stagefright.enable-meta=true
media.stagefright.enable-scan=true
media.stagefright.enable-rtsp=true
media.stagefright.enable-http=true
media.stagefright.enable-record=true
#
# HDMI
ro.hdmi480p.enable=true
rw.fb.need2xscale=ok
media.amplayer.osd2xenable=true
#Dual display
ro.vout.dualdisplay2=true
#
#camera DCIM
dir,0:sd only,1,nand only,2,sd first
ro.camera.dcim=2
# Disable preload-class
ro.amlogic.no.preloadclass=1
#Camera/camcorder enhancements, improve jpeg quality
ro.media.enc.jpeg.quality=100
ro.media.dec.jpeg.memcap=8000000
ro.media.enc.hprof.vid.bps=8000000
ro.media.capture.maxres=4m
ro.media.panorama.defres=2612x1840
ro.media.panorama.frameres=1024x720
ro.camcorder.videoModes=true
ro.media.enc.hprof.vid.fps=60
#
# App optimization
ro.app.optimization=true
#
# ADDITIONAL_BUILD_PROPERTIES
#
ro.opengles.version=131072
ro.config.ringtone=ArgoNavis.ogg
ro.config.notification_sound=pixiedust.ogg
ro.config.alarm_alert=Plutonium.ogg
#
#Disable error checking (speeds things up a bit)
ro.kernel.android.checkjni=0
ro.kernel.checkjni=0
ro.kernel.qemu=0
ro.setupwizard.mode=OPTIONAL
net.bt.name=Android
dalvik.vm.stack-trace-file=/data/anr/traces.txt
#Disable.Google.OTA.Checkin
ro.config.nocheckin=1
#
keyguard.no_require_sim=true
ro.setupwizard.mode=OPTIONAL
ro.com.android.dateformat=dd-MM-yyyy
ro.com.android.dataroaming=true
ro.url.legal=http://www.google.com/intl/%s/mobile/android/basic/phone-legal.html
ro.url.legal.android_privacy=http://www.google.com/intl/%s/mobile/android/basic/privacy.html
ro.com.google.clientidbase=android-google
ro.com.android.wifi-watchlist=GoogleGuest
ro.error.receiver.system.apps=com.google.android.feedback
ro.setupwizard.enterprise_mode=1
drm.service.enabled=true
ro.carrier=
ro.gsm.sim.operator.numeric=
ro.gsm.sim.operator.alpha=
ro.gsm.sim.operator.iso.country=
ro.gsm.operator.iso=
com.ti.omap_enhancement=true
com.ti.omap_enhancement_s3d=true