How much do prep ratings matter? Of The Top 100 picks in the 2007 NFL draft, 57 weren't four- or five-star commitments

http://sportsillustrated.cnn.com/2008/writers/stewart_mandel/02/04/sec.recruiting/index.html

"That's what the numbers bore out, anyway, when I tabulated Rivals.com's average recruiting-class rankings for every school in each of the six BCS conferences over the past five years, 2003-07. (If by chance you're one of those who believe recruiting rankings are a bunch of bunk, it might interest you to learn that the four teams with the best combined class rankings over the past five years were USC, Florida, LSU and Georgia. The Gators won the 2006 national championship and the Tigers, Bulldogs and Trojans finished 1-2-3 in last season's final AP poll.)"

And if you take each team's average star rating per player from 2003-2007 the top 4 teams are USC, Florida, Texas, and LSU. The only teams to win National Championships in that timespan.