Your an OSU fan so I dont think you will concede anything, but here's a shot. First off, lucky was too strong of a word. Agreed. However, that OSU defense wasn't even a top 5 of the BCS era. Heck, Miami's offense wasn't as great as you make it out to be that season either. I don't think 2009 Florida was the top defense of the BCS era, but they only allowed 14 points to the OU team that broke every college football record for offense that season, including points scored per game. Heck OU's defense in 2000 was better than OSU's....they shut out an FSU offense that was as good as 2002 Miami's. Bama has had 2-3 defenses better than OSU's that season and so has LSU. Don't get me wrong, I'm not saying OSU was not a great team that season, they were an underdog for a reason though. They did win with defense, but that doesn't make it the best in the BCS era.
Also, by "shut-down" Willis McGahee, don't you mean injure him? haha, I know it was in the 4th, but he was on pace for almost 100 yards rushing with 67 yards and 1TD. Not exactly shutting down, but he didn't go crazy. The buckeyes had 2 big time defenders in Smith and Gamble, but overall you can't say it was one of the best defenses of the entire BCS era IMO, although they were very good. Hey I actually rooted for OSU that game....hated those Miami teams, but I think they were one of the weakest BCS title winners. All that matters though is that they won...and no it wasn't by luck. I misspoke.
As for LSU being overrated....maybe. However, their offense just as good if not better than the previous 2 national championship teams from LSU. Heck, the last one had 2 losses! I agree that college football as a whole is down, but that doesn't mean LSU isn't a great football team. Are they the best? Not at all, but they compare favorable to a lot of the great teams of the last 20 years. Top 5? Probably not. Better than Bama? Well they beat them on the road and they SHOULDN'T have to prove it again. They should get to play Okie State and prove they are better than the big 12 CHAMP. The media bias doesn't like the big 12, but the computers listed it as the toughest conference...and Ok state had to play every single team in it. Bama didn't even play South Carolina or Georgia. But that's another argument...