Standing up to test based evaluations

Here's something you don't hear often, principals protesting. A group of principals in New York state have signed a letter protesting the use of test scores in teacher and administrator evaluations. They cite a lot of the same concerns everyone has about implementing the "reforms" of Race to the Top; not every course has a test, the tests aren't always reliable when they do and the student tests are not designed to evaluate teachers.
The New York Times has the story here.