I think they commit certain penalties at the same rate as other schools. It's just not called. Holding is a prime example. What they don't do is commit stupid penalties like false start or pass interference on 3 and 17 extending a drive. But all of what you mentioned comes down to one word...discipline. He has the elite of the elite recruits so they are already above average talent wise and usually work ethic wise. They probably already possess a lot of on field discipline. So it's not like he's taking scraps and turning it into diamonds. But he's a hard nose unmerciless dictator that demands perfection and the players know if they don't give 100% every play there's 5 guys behind them just as talented just waiting for their shot.