Well.
We were there Dec. 12, 13 & 14th and it WAS NOT packed in the least. We walked on to Tot!!! The restaurants were not full and the rides were not even operating at full potential. In the 15 years or so that we've visited this exact same weekend, the crowds this year simply do not compare.
Plus I can tell you the crowds at "snowing nightly" in Celebration were way down and the weekend before Universal was nearly dead.
I have no doubts that they have had busy periods but on a whole I beleive it has been slow and January will see crowds so low you'll feel you're at a private party of your own, on occasion.