I have noticed at least 4 SDN'ers who just got off the Hopkins waitlist and a bunch of offers to the finer UC's in the past week. So let's assume that 40% of all applicants frequent the SDN boards that would mean about 10 waitlist offers to Hopkins in the past 3-4 days and a big bunch to the UC's, conservatively at least 20 spots to UC's.
It's not huge movement but it is signficant considering this movement must trickledown to all Lower ranked schools. So based on 126 accredited medical schools and say 100 of them "lower ranked schools" compared to the ones mentioned above, at least 3000+ seats will be exchanged, quite a game of musical chairs.