The RPI computer rankings, which the NCAA tournament committee no longer officially uses, but still uses, is in love with the MAC. Well, at least as in love as they can be for a mid-major.
The Buffalo Bulls, coming off their impressive win against Ball State, are the highest ranked team at 29. Ball State, who was also impressive in their comeback but ultimate defeat at the hands of the Bulls, dropped to 40. Central Michigan is sitting at 45. 40 and 45 would probably be good enough for a power conference team to get an invite, but not a MAC squad.