After a few weeks of ownership, this set just keeps getting better! There's still a hint of non-uniformity, mostly near the edges, but it's a non issue as you really have to have a white (or black) screen paused and really look for it. As for lag, been playing Halo Reach, Gears of War, and Black Ops on the Xbox 360. No sign of any lag (and I looked... hard). The key is that you must use the "Game" picture mode and be sure not to turn on ANY of the fluffly little processing options like the smoothing filters or even sharpening. Just leave them on defaults. Only thing you can turn on is super res. If you keep it like that: no lag at all. None discernible anyway. I have my audio set to 20ms delay so I guess there's a tiny hint of it: but there will be on any TV.