List of champions since 2003:
2003 LSU BCS, Billingsley, Colley, DeVold, Dunkel, FACT, Massey, NFF, Sagarin, Seattle Times, USA/ESPN Yes
2006 Florida BCS, USA Today, AP Yes
2007 LSU BCS, USA Today, AP Yes
2008 Florida BCS, USA Today, AP Yes
2009 Alabama BCS, USA Today, AP Yes
2010 Auburn BCS, USA Today, AP Yes
2011 Alabama BCS, USA Today, AP Yes
2012 Alabama BCS, USA Today, AP Yes
2015 Alabama CFP, USA Today, AP Yes
If the SEC has been better the past 13 years or so on a national level is not an if but rather a fact more or less.
I would love to see more southern teams play up north in November, and a few "Blue Collar" Bowls played in the snow and ice of December and January for Championships like Mich, Mich St, Ohio St, Penn St, where the weather is a factor regardless of conditioning. It is a shame that all the championship games are in warm sunny venues or domes favoring the West Coast and Southern teams. A conference builds its teams in the North to play ball in those conditions - Alabama would fare well but so many others in the PAC 12 or SEC would not in rain, snow and freezing temperatures.