We went to the pasta party Friday night and Epcot didn't seem that crowded. Test Track was 50 minutes and we made the last group at Soarin' and that was a walk-on. Can't tell you about Sunday. We did the Marathon and were asleep by 5PM.
It only 'predicts' so therefore I would not take what it said as accurate It relies on past data which changes every year, nothing much they can do lol