Except that nobody gives that reason.
The reason that everyone has OSU in is because what "matters" is the entire season.
OSU has 5 wins against RPI top 50 teams and no bad losses.
All of the teams that are still "on the bubble" typically have only 2 or maybe 3 RPI top 50 wins and a couple (or more) bad losses.
OSU also beat Colorado on a neutral court when they still had Dinwittle. (sp?) Colorado is still going to be a tournament team, and they would have likely finished near the top of the Pac 12 with Dinwittle.
There's definitely some credence to their wins vs top 50 teams. Even with that considered, they sit at 40 (tied with Nebraska). Seems like everyone screaming for everyone to look at their entire body of work then wants to ignore how average to below average they've been during conference play.
Colorado is 30 in RPI and has a MUCH higher SOS.