It was a Pew Research study. I can’t find a link that works, but it said that 48% of people who regularly listen to Rush had high knowledge. Only people who read publications such as the Weekly Standard, National Review and New Republic scored higher. In contrast only 21% of those who rely on MSNBC for their news had high knowledge. Most of Rush’s callers aren’t dumb as much as they are nervous and tongue-tied.
Interesting. When you find the study, please post it.
And I have no doubt that Limbaugh listeners are smarter than the 172 cretins who still watch MSNBC.