I don't agree on the phrase "human rhythmic error". I think even tone deaf people can play and enjoy these games.
EDIT: If you are complaining about calibration with your HD TV, I would recommend that you simply use your ear to play these games. If you look slightly above where you are supposed to play, and you are in time to the music, the game will credit you with hitting the note (even though it looks slightly off on an HD TV screen).