And I'd be right in arguing that the Big XII and Big Ten are comparable over the last ten years. Both have been the best conference twice and the Big XII has a better average record. There's not a lot separating those top 5 conferences. Tho, until the last 2 years, the ACC held a noticeable edge (if you only do the 8 years up until 2010) and the other 4 were a step behind. But that's kindof cherry picking an arbitrary 8 years.
Code:
http://statsheet.com/mcb/conferences/stats/rpi?season=2011-2012
Conference RPI the last 10 years
Big XII 3 3 1 3 3 7 5 3 4 1 = 33
Big Ten 1 2 5 2 6 4 1 6 6 5 = 38
Big Est 2 1 3 4 5 5 2 2 3 4 = 31
ACC Con 6 5 2 1 1 2 4 1 1 3 = 26
SEC Con 4 6 4 6 4 1 3 5 2 2 = 37
Pac 10 9 7 8 5 2 3 7 4 9 6 = 60
*Technically the Pac-12 was 10th last year but I went with 9 to keep it single digit
403 Forbidden
Conference RPI the last 10 years
EDIT: Funny that the link shows up as forbidden but it still works for me.
SI