Don't be silly. Perry is not Sarah Palin. Therefore, ipso facto, he MUST be a RINO!
I predict that Sarah will endorse Rick Perry, though it now is starting to appear her supporters will not be needed to get Perry the nomination. Since that is the case, there is no good reason for her to endorse at this time.
As much as I love her and support her, Sarah is not going to run for president in 2012, and is unlikely to never throw her hat in the ring for more than a decade, if ever.