I believe that it is a combination of all...
I cannot think of the last NC team that didn't get to the NC game w/ some LUCK of some sort.
That being said, I'm convinced this team is conditioned so well that their bodies can take the beating but their conditioning keeps them mentally in the game so that they do not position themselves to get hurt.
Basically, if they keep focused w/o being winded then they can keep themselves out of trouble, not only physically but also mentally :arrow: A strong indicator of this is lack of injuries as well as minimal penalties.