Most comments by players/coaches are empty. They're meaningless air fillers. Saying that one team smacked another in the mouth doesn't mean anything other than that they likely won the game.
I'm far from a Kelly hater, but I don't think they played well against GT or all that well against Navy. GT had a TD come off the board thanks to an apparent phantom hold and their offensive line played poorly (lots of missed assignments). Several unforced errors from their QB too -- a fumble to start the 2nd half and a poor pitch in the redzone. GT just played like crap, and I would be saying the same thing even if the game finished 30-7 instead of 30-22.
I don't think what ND is doing on defense is completely sound vs option teams, but the coaches are getting better.