I applied to like 13 schools, and all but one have sent out interview invites. Everyone says "it's still early in the interviewing season so there's still plenty of time," but my concern is that since I did not get an invite in the first round when my application was in, it means that they put me in a "maybe pile" off to the side, and as more applicants submit secondaries, they will be the first to receive interviews, and we in the "maybe pile" are ignored until the end of the interview season when the committees remember us and say "oh yeah, well, we already filled up all our slots, so throw that pile into the furnace!" It seems like if you don't get an interview shortly after your file is complete at a school, you have little to no chance of getting accepted there...