[baumer]

This is a problem that usually only happens with TVs that only display one resolution.

DLPs are the most common as they always have to convert video signals to their native resolution. I haven't heard of other HDTV types working this way but you might want to check out exactly how your TV handles certain resolutions.

It could be that the TV is set to upconvert any signal to 720p or 1080i or whatever, so when your Xbox display sends at 480i or 480p the processing causes the lag. If your TV lets you change this resolution setting try setting it to the same as the Xbox signal.

New consoles won't have this problem as they are all 720p (maybe not Wii, not sure) but Xbox and PS2 were horrible on older DLPs.

Guitar Hero II (PS2 game) addresses this issue with an in-game video lag compensator. I wish the PlayStation 2 and Xbox would get a firmware upgrade or something to support this from the operating system.