When I was going through all this last year, I received very little information before November. But, of the 51 places where I applied here's what I remember:
I got interview offers from JPS and Marshall on back-to-back days in mid-October. I got an offer from Summa Health towards the end of October. UVA and several other programs sent me e-mails to tell me they had downloaded my application. I got an early rejection from Wake Forest (early November). I also had a phone interview with Banner Good Samaritan in November.
My first actual interview was November 15 at Summa (where I ended up matching). Later that week I had JPS. Most of my offers came mid-November and most of my interviews were in December and January.