Nerd News: Political Grading Study

Here's the link, but the reader comments are more interesting.  The "study" sounds like utter nonsense to me.  I'm glad to see that other nerds think so too.  It would have made more sense to have the two groups of professors grade the same assignments by the same students and then look at the results ... but I really think the basic assumption (that professors assign grades based on their personal political views) is deeply flawed.