Oh, yes. Liberals are just too erudite and cultured to make it on talk radio.
After all, they've merely spent decades calling their opponents sexists, fascists, racists, homophobes, unenlightened bigots, oppressors of "people of color." That's all very cultured, you know; that's very much in line with a "language of the classroom."
Most liberal activists are elitist snobs who either lack the capacity to recognize their own intellectual limitations or are flat out intellectually dishonest in their effort to shove their ideas down everyone else's throats.
Sadly, that is very much inline with the language of the majority of classrooms today. With few exceptions, college faculties are deeply hostile to any conservative viewpoints. The good thing is students, (being students and thus in their normal state of rebellion against elders), are starting to see this lopsidedness, and recent polls show they are trending conservative.