"The difference in this 10ms of lag is that it crosses past 16.6, which is one frame. In competitive gaming, that one frame makes a difference, especially in rhythm and fighting games. I was hoping that there would someday be a large, full-featured TV with less than a frame of lag, but I doubt it will ever happen. My questions would be if there is an improvement in VGA mode, and was "Game" mode used, and what was the difference?"
FYI, I worked on many Xbox games while at Ubisoft and I can tell you that, insofar as the input lag of the wireless controller is concerned, it adds ~55 ms to the mic input. Probably similar to the overal lag, I would guess. But don't quote me on that. Lag is teh suckage, lower is better but one frame extra on your TV is not going to make a huge difference when it's already > 100ms, IMO.