Reading through various schools thread will give you an idea of how those schools timeline works. Almost all dont release until deadlines. A few release all decisions a little earlier than deadlines. Others do rolling decisions. Some also ding people who dont get an interview invite by a specific date.
I suggest you read the threads for the schools you are interested in...that will tell you a ton of information that will be helpful.
Kellogg Class of 2010...still active and willing to help. However, I do not do profile reviews, don't offer predictions on chances and am far to busy to review essays, so save the energy of writing me a PM seeking help for these. If I don't respond to a PM that is not one of the previously mentioned trash can destined messages, please don't take it personally I get so many messages I have a hard to responding to most. The more interesting, compelling, or humorous you message the more likely I am to respond.