From Yahoo! Sports. Check out the entire piece on this link.

Since the NFL's playoff format changed to 12 teams in 1990, we have seen at least five new teams reach the postseason each year more times than not.

Last season, you saw six of the eight division champions from 2011 repeat in 2012.

So how is last season's postseason field faring in 2013? Not too bad if you're in the AFC and not too good if you're in the NFC.