Validation for RateMyProfessors.com?

Inside Higher Ed: "But what if the much derided Web site’s rankings have a high correlation with markers that are more widely accepted as measures of faculty performance? Last year, a scholarly study found a high correlation between RateMyProfessors.com and a university’s own system of student evaluations. Now, a new study is finding a high correlation between RateMyProfessors and a student evaluation system used nationally."