I go to UT, but grew up in the midwest, ie, Big XII country. So, I understand they don't hold the SEC in as high regard as most people in the South. However, the SEC is leaps and bounds better than the PAC-10, the Big East, and the old ACC.
Next, teams in every major conference regularly schedule non conference patsies. That is why the Texas-Ohio State game was such a big deal this year, because Texas wasn't playing 3 non conference teams, the best of which is North Texas (also insert OU there.)
True, USCs win over OU was one of the most dominating national championship performances in the history of college football championships (a whole 7 years!

However, that in no way makes it automatic that they would have even beaten that Auburn team. USC got to a very immobile Jason White early, threw him off his rythm, and the game was over. Jason Campbell, however, was more in the Vince Young mold, a QB that could throw and run. Oh, and Campbell had 2 more than capable RBs to hand the ball to, in Cadillac and Ronnie. Auburn would have matched up very well against that USC team, especially since L. White wasn't yet the factor that he was in 2005.