I mean - if they are correct and holding was happening all game long and the refs weren't calling it, that's a LOT of 10 yard penalties with a first down extending drives. If it could've been called on every play, then BYU gets as many chances as they need to get into the endzone.
Now I'm just as disappointed as Ute fans that the refs waited until the last drive of the game to call that on Utah. Darn it!