Fortunately, McQ and some spare time and has blown that meme out of the water.
What's that tell you?
It tells you that despite all this twaddle about 'structural problems' in talk radio, that where at least Limbaugh and Hannity and progressive talk go head-to-head, listeners have consistently and overwhelmingly chosen the Limbaugh and Hannity.
Be sure to go and read the whole thing.
Update: The Fairness Doctrine has been temporarily staved off. Of course, it don't be surprised to see it re-appear under a different guise.