Hi, I've been following this thread for so long now. I emailed the AdCom and the chair of the recruiting com of the joint Pitt-CMU program and the chair of the rec.com. responded right away stating that " I don't really know about the status of the review process in any detail (aside from the fact that it is ongoing)". Also, "it is not unusual to not yet have heard about any decisions yet, at this time of year."
He says he'll try to touch base with the AdCom and email me back once he has some update on the process.
Good luck!