Very crowded for sure! Last year it was more crowded then I found worth it. Even for DL, as much as I love being there, I didn't find it enjoyable when it got to the point where even POTC and Pooh had a long wait!! Not to mention the wall to wall people, where you couldn't even get around. We spent more time in the hotel then usual, since we would get tired quickly of the crowds.
My advice is to get there early, and really take advantage of those FP!