2013 it was 28-22 in favor of the Pac
2012 28-26 Pac
2011 31 (10 team Pac) 30 (12 team Big 12).
2010 30-29 in favor of the Big 12
So in the last 5 drafts the Pac has had 150 players drafted to the Big 12's 124. A per team average of 2.68 for the Pac vs. 2.30 for the Big 12.
There is elite talent in Texas. They seem to be playing in the Pac-12 or SEC.