The SEC is far and away the best conference this year with a nearly 5 point margin over #2 when looking at the average rating. There is a group of 4 covered by just 1.4 ratings points behind them with the Pac-10 having a bunch of good teams and just one very bad one, while the Big-12 has several not so good teams pulling their average down.
The Big-Televen does manage to stay ahead of the non-BCS schools but clearly is not very strong this year and it is a bit of a travesty that they get two teams in the BCS. For those looking for support of TCU over Boise State, there is over a 2.5 point margin between the Mountain West and the WAC.
The Sun-Belt appears to hardly deserve to be in the FBS/I-A with an average less than the low of the top 6 conferences (save WSU) and a high that is worse than the average of the top-6. They do get to serve as the doormat teams for the SEC with 10 of their 32 FBS non-conference games being against the SEC, twice as many as any other conference.