Oprah's fans: mad at her for getting uppity

Confirming something I was speculating on a couple days ago, there is an eye-opening piece about the price Oprah is paying for backing Obama on the Root, a great blog hosting writing by some of the country's leading African American scholars and commentators. After she stepped out to campaign for Obama, Oprah's favorability rating dropped to 55%, a steep plunge from her usual favorability score of around 80%. The piece, written by Marjorie Valbrun, doesn't ask the question I want to ask: is any of this the product of a viral campaign by Clinton, begun, perhaps, with some astroturf postings on Oprah's message boards?