We ate there in Sept. (3 of us) and it was about 1 1/2 hours. It was extremely crowded and the characters were moving kind of slow. It took a while to get refills of anything because our poor waitress had about 9 tables. We didn't mind the wait though because it was pouring rain outside.
We are a family of 5 and it took about 1.5 hours last Sept. They were very busy during the time we were there. Everyone enjoyed the meal and character interaction and we plan to book again for our next trip.