I interviewed on 2/7, and was recently waitlisted, but I pretty much expected this based on what I was told. When I was there, admissions basically told us by that time they had already offered 300+ acceptances for a class of about 175 students. So, pretty much everyone that interviewed that day was told that they would receive either a rejection or a waitlist because they were unable to hand out many more accpetances. We were also told that this wasn't necessarily bad news since their waitlist is very active and that 1/3 of the class would come off the waitlist. Letters of interest (and intent) and updates were encouraged.
I looked through last year's applicants on the forums, and many were in the same situation. Many got off of the waitlist by early summer.