I interviewed on 5/6 Jan. From what I've heard, the three of us who made it from my group were the first in. Low end hiring numbers I've heard were 30/month, high of 70/month. So there's at least 120, but the rumor of 200 or so sounds pretty reasonable.
The real question is what class sizes will they run (i.e. how fast they can drain the pool). Any guesses?