Agreed on USC. Not only do they not really see stiff competition, but even the 'tough' games they play don't beat them up as badly has having to face bruisers each week in the SEC and to a lesser extent, the Big 12.
So, by a potential national championship game, their players would be a lot less dinged up than say, a Florida.
I was surprised to see the Texas O-line get dominated like that last night, but even more surprising was the complete defensive breakdown in the first half and then in the 4th quarter with the game on the line.