I agree with chubberubber about interviews. Last year, I applied (9 programs), but didn't get in. By the beginning of February, I already was certain I wasn't getting in although I'd only gotten one official rejection. I paid attention to the Results Search and communicated with people who HAD gotten interviews with the POIs I had applied with. In a sense, it was comforting psychologically, so that the waiting limbo was finished. Additionally, it was no shock when I got each subsequent rejection. It became kind of a joke between my husband and I when I got each one, because we had already known it was coming.
That being said, interviews were done for each of my schools, so not getting one pretty much showed right then that I was not being considered. Could they have decided against each person they interviewed, and called me out of the blue to schedule an interview? Sure. Likely? Not really.
So nothing's really over until it's REALLY over- official rejection and all. What I described before was the case with the schools I applied to and the program I was applying to. Don't take advice from everyone on here. Make sure you look at what field they are in before you judge how well it might apply to you and what you should expect.