As for whether Rush's numbers are too low, keep in mind this point. The person who controls Talkers Magazine is Ellen Ratner. Yes, that Ellen Ratner, who is a Howard Dean-style hard left Democrat who said on air on Fox News that she "hoped" enough Americans would be killed in Iraq so that Bush "would not be elected."
So, it certainly galled her to list Rush as tops on "her" list, and perhaps some games were played with the numbers to push Rush down from his usually-cited 15-20 million in audience.
Congressman Billybob