Applicants from last year learned this the hard way! The AADSAS portal does not update at 12AM (EST/PST, etc.). Midnight, 12/2/13 was very anti-climatic. Your chances of finding out of your acceptance will probably come from a phone call or through email. Some people were notified via email pretty quickly, at around 12AM. I got my first acceptance at 3AM PST through email, so it definitely varies between schools.
Don't know if schools/the AADSAS people will be more proactive this year, but don't be disappointed once the clock strikes 12 and nothing happens!