Not to throw facts into the face of your well thought out opinion but here are a few of Carroll's stats since getting to USC
Overall vs top 10: 14-4
Overall vs traditional rivals: 16-2
Overall bowl record: 6-2
Overall BCS bowl record: 6-1
I defy you to find a guy that has been that consistent in big games for that long. Tressel is probably the closest you are gonna find and his bowl record just doesn't even come close to stacking up.