I've heard in various places that this tablet lags a bit. If you turn off the various Touchwiz animations (assuming it is possible to do so), does it help with the lag? Usually the first thing I do on any device I'm using is turn off any unnecessary animations and eye candy, like the effects that some launchers have when switching between home screens, or whatever. Probably as a result of this, I've never had any lag issues with any Android devices.