I actually have a high regard for the Big Ten (eleven), but I know that part way down the league teams turn to jelly. The same could be said for most leagues, but for each league the point where teams turn to jelly is different.
The Pac 10, I'll use this as an example most often because I went to a Pac 10 school, is so top heavy with USC now that the other teams are kinda suffering because of it. Players want to either play at USC or another conference because they don't want to play against USC every year. Oregon is good, but they are ranked where they should be. ASU might be good. Arizona is on the way up, but they have a long way to go. Cal may be a little higher than ASU, but should be just outside the rankings. UW, WSU, Stanford, OSU, and UCLA are all bad in varying degrees, which sucks for me because I graduated from the UW.