I'm jumping on this thread a little late, but I just finished my application last month and am anxiously awaiting all of the responses! I applied to Penn, University of Michigan, Boston, University of Connecticut, Duke, and Rutgers. I am getting a little nervous about one of my recommenders. She was very enthusiastic about writing letters of recommendation for me, but for some reason she is submitting each letter one at a time. I've had to email the week that each application is officially due to remind her. So far she has submitted anything late, but it's kind of a hassle to remind her every time a recommendation is coming up to be due.