There has been plenty of discussion since Rivals broke the Harbaugh suspension story on Monday. Most people are considering two things really: Why have any suspension? and how did you get to 3 games?
Michigan seemed to have a deal in place with the NCAA for 4 games. I believe about 80% of that. I think Michigan was probably around the 2 games area and the NCAA was around 6. I think 4 was a negotiated situation where neither side was happy. The NCAA infractions committee was probably closer to 6 games and that's why they didn't accept it.