Depends? I've been frantically checking the interview dates forum/this one to see if people have gotten invites yet. I also applied to Yale (neuro) and have not heard from them, but as far as I can tell nobody else has either (neuroscience interviews on Feb 17th anyways, so there's still time by the 2-week rule mentioned above). Same for MIT and UC Berkeley. But yeah...check and see if people have already heard from your program, dude!