I have a couple of friends that are visiting Potter for their first time ever today. They just so happened to attend the one day that hasn't happened since Supercharged opened with the park filling up to capacity. All they had to do was wait one week.
I checked Disney and the waits are fairly manageable. two hours for ToT and RSR, an hour for Indy, 25 for Pirates, and 30 for Matterhorn.