I doubt that this last round of acceptances will have 15 acceptances. The feeling I got from the interview was that there would be a few (probably just under 10) to finish up the 42 in March and then based on the intial pre-April 30th shuffling, there would be a few more admits in April. However, I don't know if the acceptances in April are given to "active pool" folks or if it is after the waitlist is made. My guess is that active pool remains till those few acceptances in April and then they massively narrow down for their waitlist (which I think is very small, ~10-20?, because their class is only 42).
Does anyone know what date in March the next round of acceptances will be? I think last year it was mid-March exactly.