yes most one you find in best buy, CC, ect are "slow" they have on average a 40-50ms Rise/Fall (50 rise, 50 fall). you can get better ones on the net. BUT they cost you. 15ms Rise/Falls are good for gaming/movies. but for office use the 50ms's are fine.
Planar & Cornea Systems, both make good gaming/movie LCDs Cornea has a 25ms Rise/Fall unit, planar has a 15ms Rise / 10ms Fall.
rise means how long it takes to turn the pixel from full off to full on. and fall is the reverse.
faster = better for games/movies
One more thing to note, LCDs must be run in their recommended mode to look good, 1-1 pixel usage. running the below their recommened setting causes it to look "rough".
A 15" LCD is 1024x768, so the best res to run it in is 1024x768. Running it at 800x600 leaves 224x168 extra pixels. Since the picture extends from edge to edge regardless of setting. It will then stretch over those pixels. Roughening the image. This does not happen on a regular CRT as much. But it does happen, though far less noticable. Why I cant fully explain, because I do not know. Goto BB, CC and change the monitor res for a LCD from its current to another. Watch what happens to the text. Then set it back to its normal mode. See what I mean?