My wife and I went two years ago in June and the lines weren't that bad at all. We event went on a Saturday. The longest line was for Back to the Future which is now The Simpsons ride and the line was 35 minutes long. We basically walked on to Jurassic Park and The Mummy a bunch of times. I think we waited around 10 minutes for the Mummy at one point in the day but that was it. Everything else was a minimal wait. Don't even bother with the FOTL passes, they're not worth it IMO.