not a vetran, but can offer my 2 cents...
i agree w/andy, no big deal if you haven't sent out apps by now. Only real advantage of an early Sept SENDOUT appears to be date selection preferences...but if you're done by mid Oct even poss by end Oct, I think you'll be fine. You might not get your FIRST choice, but second shouldn't be a problem.
Me, i was one of the ancy people that sent out sept 1...but i ended up adding a few places just recently, and overall interview offered pace seems to be about the same...which is to say slow as all h*ll. From reading "interviews 2005" thread, seems like month of Sept was decent in terms of interviews offered, but i wonder if Oct will be the same. My feeling is that if places wanted to offer interviews early, they'd have done it in Sept, and so Oct should be a bit slower with post-Nov 1 being the real next swing of interviews. I think after MPSE/deans is out, there will be mad rush then...interviews will be given out like candy on halloween.
I do wonder though when the is the latest date a place would offer an interview... late Nov?? Early Dec? even Jan??? anyone have any ideas?
but altogether, no, i think you're fine and not too late whatsover.