I can't find it right now, but I read a study where the various types of penalty were compared to teams winning percentages. Only one type of penalty was a good predictor of a teams record. That penally was the false start. Obliviously the more false starts a team had the worse their record tended to be.
The thinking being this if a player is having problems with one part of the mental game (remembering the snap count) they are probably having problems with other parts of the metal game (picking up the correct guy in pass protection).