Hello all,
Im a current PhD student at UNC, so maybe I can offer a little insight to you all. From what I've heard, there is no formal waitlist this year, so if many have been rejected, but you've heard nothing, then you're definitely on a short list for your field but won't be notified (so I believe). We had prospective weekend a week or two ago, and are waiting for reaponses to the 20 or so offers that were made.
FYI, whenever a student within a particular field turns down an offer the funding associated with them goes back to a general pool and the faculty assesses who, from all fields, should get that returned offer. So, if they made 5 offers to Americanists, and they all said no, those five offers could, theoretically, end up all going to military historians if the next 5 best candidates happen to be military.
Good luck to all!