Towerjunky said:
A good talk show encourages opposing opinions. Liberal callers automatically go to the front of the waiting line to get on the air on the major conservative talk shows. Unfortunately a good, intelligent conversation rarely follows which tells me those callers can't defend what they believe so the shows tend to have more like minded callers and it does sound like affirmation radio. But not for the reason you stated.
As someone who has witnessed first hand the synthetic nature of many of these talk shows at the studio in their production phase, I can tell you that, with rare exception, articulate opposing view points are usually put on endless hold ("I'm sorry, we've moved on to another subject. Call back some other time") and the flakiest opposing viewpoint callers get right on. I will let you in on something: I was around the table one day in a pre-show session between Merle Pollis and Joel Rose (remember those guys?). I was shocked to witness them prepping an intern how to call in and act like a flake who disagreed in order to jazz up the show.
Hannity does it all the time. He makes sure some dizzy flower child gets on so he can make a fool of her. Franken on the left used to have this right wing whack job caller on all the time with crazy conspiracy theories just to present the opposition as a bunch of flakes. These might have even been interns and production guys, who knows?
The exceptions are people like Dennis Prager and Mike Medved, but their shows have no ratings because a real debate between equals is not what most people who listen to these silly shows want.