Originally Posted by vredg
I have a Panny ax100 and am playing Rock Band/Guitar Hero a lot (I think those kind of games are among the most lag sensitive of all). Never had any problem with perceived lag and I've never used the audio/video calibration in-game. Nor have any of my friends complained of missing notes due to lag. I've not measured it though. At friend's I've been irritated by lag on their LCD TV's, so I'm not insensitive to lag.
I've now ordered a Epson 8350 though. It should have lag of around 18 ms according to reported measurements. I'll report back when it's installed and I've tried some drumming.
GH/RB is sensitive to lag, but if you are used to it, you can 100% account for it. They tell you the note to play way ahead of time, so all you have to do is play it early/late if you have lag. You get used to it and then it feels totally natural. Then when you play on someone else's system, even if theirs is lag free or properly calibrated, it will fell "off" to you, even though it's more correct.
Other games may seem more forgiving of lag, but since the content they are throwing at you isn't so "telegraphed", it can actually be more impactful. Though you might only suspect that you're not good enough, you're not fast enough, or the game is just sluggish instead of suspecting lag from your display.