I personally have no experience with that weekend, but I am sure they say its busy - not summertime busy or christmas busy, but there are some crowds.
Hope someone else comes along soon to help you out!
I don't know how much help this will be....I've never been to Universal during this time but I have been to Disney World. And it was insane! Even more crowded then I remember summer months being. But Universal tends not to be as crowded as Disney so I'm not sure what their trend is.