I applied to 15 schools. Applications were submitted, and GREs ordered, anywhere between 11/25/16 and 12/30/16. Some schools from every week in this stretch have said they haven't received my GRE scores yet, including Carnegie Mellon, which the order receipt confirms was sent 11/25/16. Is their site slow? How long, especially during these two holiday weeks, does it take for the scores to get to schools?