I'm not sure where this misconception got started, but Florida and Georgia are both good schools that are as good or better than many Big Ten schools. Alabama and Auburn are both decent, and as good or better than the bottom quartile of the Big Ten academically.
According to a quick scan of this page, the Big Ten has around fifteen Nobell laureates. SEC has two, both from Vandy. Big Ten laureates are from a lot of different schools including Minnesota, Northwestern, Illinois, Wisconsin, Purdue, Indiana, Rutgers, and Maryland. This is not the objective way to measure a school but data points like this may have contributed to the perception.
http://s.wsj.net/public/resources/documents/st_nobel-prizes_20091012.html
I'm curious, which three would you place even with or below Alabama and Auburn? And which additional schools would you say are at parity or below Florida and Georgia?
My back of the envelope ranking:
I think Nebraska, OSU, and MSU are the bottom quartile.
PSU and Iowa escape to the next tier joining Purdue.
Wisconsin, Illinois, Indiana, and Minnesota,are in the top half.
Michigan and Northwestern are the class of the conference.
I honestly can't say I'd put any of them below the Alabama schools.