The sad reality is that many of the most senior professors and lecturers in top universities are their for their research rather than teaching ability, and that the success of the elite institutions is somewhat self-selecting as regards their cachet and filtering done by their admissions process (i.e. Ivy League institutions do not offer athletic scholarships).
So that's about 0.75%.
The rest were either competent, good or amazing.
(Then again, one of the remainder was internationally famous for being a (self-acknowledged) media whore and while I know he added value it wasn't always to the subject at hand)
School is now distant enough for me that I have reached the brain fog age where I cannot be commenting on internet things intermittently while writing documents…