When we went last fall, they had the entertainment on the 1/2 hour so it would be at 1:30. Most of the time, you do get to see it unless you just miss it coming in or you are very fast eaters. I have seen reports that some days it's on the hour so you might want to try to get there about 12:50 just in case it starts at 1:00.
Sorry, I wasn't much help was I??? I really don't think it's consistant all the time, but you should see it if you are there at least an hour.