The Indiana players have long arms and are able to clean the glass. That is where the game will be won. This IU team runs their offense very well, good movement, lots of screens. If it stays close(IU can clean their defensive boards), IU can pull it off.
I hope OU is underestimating IU like Duke did.
Some people think of Oklahoma as a football school. But really, we're a basketball Mecca around here. Men and Women's team in the final 4 the same year. And many are noticing that our basketball team hits every bit as hard on defense as our football team does :)