You are missing one crucial point in your comparison. A middle of the road SEC team has superior athletes and superior facilities compared to the middle of the road Big XII teams. The doormats in the SEC are still landing better recruits then some of the middle of the road teams in the Big XII but you would never know with the meat grinder of a schedule they play every year. You typically don't see middle of the road SEC teams going to bowl games against the likes of Navy and get their *** handed to them. Hmmmmmm....
Dobbs runs for 166 yards, three scores as Navy crushes Missouri
Navy Midshipmen vs. Missouri Tigers - Recap - December 31, 2009 - ESPN
No, you don't. Middle-of-the-road SEC teams go to the Cotton Bowl, to play the #2-3 Big 12 team. Not the Texas Bowl, or whatever its called this year. Maybe the SEC *IS* a stronger conference.
We've actually had quite a bit of success playing the SEC under Pinkel: 8-2 or something like that. None of those have been LSU, Alabama, or Auburn, but we probably won't beat those guys much anyway. They're not in our division.
It's the "middle-of-the-road" teams that are abandoning the Big 12: MU, NU, TAMU, etc. I'd expect the future Big 12 (while it lasts) to look more like the old Big 8: Two monsters at the top, and a bunch of also-rans beneath.