Hi there, I don't know which schools you've applied to but I'll tell you what I've learned:
1) Maryland will send out an e-mail later in the "afternoon" according to the Dean of Admissions. They may not updated AADSAS right away, so checking your e-mail is your best bet.
2) Pitt will call you at some point on December 1st or later, obviously.
3) Penn only sends snail mail, but they try to time it so that the letter arrives on December 1st or within a few days (I've heard rumors some people may get their letter a day early!)
4) NYU used to call, but they are considering just doing AADSAS updates this year. I visited in September, so maybe someone else will have more updated information.
If anyone has information on Case, UoP, BU, Tufts, or Temple notifications, I'd really appreciate it. Thanks, and I hope I helped someone out!