I love you Efle, but this isn't true.
Back in 2002,
UChicago was ranked 9th. All the way back in '85, they were ranked 5th, and has been hovering in the early teens/late single digits for a while until they decided to care about the undergraduate program again.
I don't think there has been any school that jumped 30 places beginning within the top 50 of any discipline, particularly one as established as medicine, although props to NYU for doing so -- particularly in the time span of 10 years.
Anyway, didn't mean to derail the discussion on HMS being leagues ahead of every other school.