I think so. Of the places I've applied to, the earliest I'll hear back is mid-February. The latest is one school that says mid-April. Others are scattered in between.
Someone told me that they publicize the latest possible date though. That they'll let their first choices know as soon as possible. Sort of their A, B, and C choices in that order with rejections going out by the publicized date.
That said, I have zero clue if that's true at all. I'm just going by the deadline each school posts.