Well on LCD observations in general...
It all depends on your expectations, I happen to have a $1500 32" 1080p TV as my main monitor and it happens to have a mode which reduces response time on one input.
When in game mode I can play anything with no problems at all, when in regular mode I notice some very slight ghosting if I am playing an older game where I get super high (150+) FPS.
Basically if your running a game in which you get a true 100+ FPS to the screen then response time on an Apple display might not be up to par, but if your in the average mans 30-60 FPS range you should have absolutely no problems with any modern LCD.
Figure an absolute worst case full transformation from GTG @ 30 ms, = 33 FPS. That's acceptable for most folks. Take into account that your average response is about 20ish with an Apple display, = 50 FPS. It's just fine for most people although not exactly high performance.