Greetings all,
Figured I'd add in what I remember from last year. Around 1/15 they send out enough acceptances to theoretically fill the class (about 180 or 160, whatever their class size is). There were a few acceptances mailed before that date, but the majority was mailed in January. I don't think they send out any post interview rejections or waitlisted until after 1/15.
As far as their interview season goes..I think they went to April/May last year.
Best of luck everyone!