While both AM con and FM lib talk tends to make me scream at the stupidity (I guess I'm just smarter than everyone else) the conservative talk does tend to have more actual fact conveyed in the speech from the hosts.
It's really hard to declare a winner in talk though. If I were for example to compare Rush Limbaugh to Amy Goodman I end up wanting to take a baseball bat to both of them. They both start off with facts, and then get to the maybes, and then the could happens, and then form their position based on the assumption that the could happen actually did happen. Even so, of the two Amy Goodman has the least potential for redemption. At least Limbaugh has a sense of humor.