I can't see them being too overfilled since they did accept some from last week of feb/ first week of March. I would expect some movement assuming they aren't over-filled.
Maybe they overcommitted? I know someone that interviewed end of March with 31 mcat, 3.6 gpa and stellar ECs that applied early and still got wait listed.
I wasn't able to get any real answers when I called admissions. Did anyone find more information about how the waitlist works?