I think you are right. I also think the class might be full already. Maybe they are currently accepting people off of some sort of unofficial waitlist as some of those accepted decide to not take their slot. Those of us who haven't heard back yet might hear soon about waitlist/rejection. I cannot think of another reason why people who interviewed early have not heard back yet, other than that they are being considered for a waitlist spot.
hey man, don't give up hope quite yet. I, like most of the people on this thread, haven't heard anything since interviewing months and months ago. My friends as well as people who I've met on the interview trail who interviewed at UNC also haven't heard anything. Judging by how many acceptances people have reported here, I'd say there are still a fair amount of acceptances left to be given. No point in stressing about any of it until you see the email in your inbox!