Harvard Political Review is a very highly respected publication. It is run by Harvard students and founded by Al Gore originally. Taylor her cultural impact - Harvard students making analogies with her songs and US Presidential candidates! Amazing!
I have a feeling Taylor hasn't peeked yet. My guess is she'll have 2-3 more albums/ "peaks". Then she'll be constant for another 2-3 albums (this is without superbowl, with superbowl - im guessing after the next album- she'll have 3-4 albums/ peaks and 3-4 constants)