HDTV lag on a 360

[Hawk]

I am pretty sure you are talking about lag created by your TV. The lag doesn't have anything to do with the 360. HDTV's generally have a 'game mode' option in their setup now. The picture quality goes down a bit, but it removes the lag created by the processing time of the TV.

Edit:  I had to use game mode when I was playing Zack and Wiki.  I was having the hardest time with the music box challenges until I remembered the HDTV creates lag and I turned on game mode.  Guitar Hero is able to be calibrated to compensate for lag created by HDTVs.