Possibly. The word here is that the faculty have met, and their choices go to the gsas dean. Allegedly, the dean's approval comes down tomorrow. From my own experience two years ago, phone calls will come quickly (mine was a friday afternoon--i was lurking here at the time but i cant remember if i posted, since the call ended my forum stalking tension). actual mail will take several weeks.
So yes, I somewhat doubt that a harvard admit is already out. Although you never know, it could be someone they want badly, or who contacted them and asked...I can't remember the details they posted, but it would definitely be by phone.