It seems there are a lot of variables that play into your question. I think you are right in the fact that many programs wait until after Nov. 1st before giving out interviews. In fact, I received a letter from one program that stated that the NRMP requests programs not to give out invites before Nov 1st. So some programs may stick to the rules. Also, how many programs have you applied? Is your application complete? I would not be too concerned at this point, as it is fairly early in the game still.