I went on the Saturday after Thanksgiving. We did Universal Studios first and then over to the Islands of Adventure in the afternoon. The wait for the Forbidden Journey ride said 60 minutes. It only took me 30 minutes to go through the queue. I was also surprised at how fast the line moves. Plus, they have a beer vendor near the beginning of the queue. Or atleast they did that day. So, buy a few beers and enjoy the scenery.
On top of that, before I went on that ride, I didn't know too much about Harry Potter. I never watched a movie or read one of the books. After I got back home, I watched the first 4 movies. I have DVR'd the 5th and 6th movie so I'll be watching those as well. I never thought I'd like these movies or anything Harry Potter. Weird what a section of a theme park will do to ya...