We just got back and it wasn't bad. We walked on pretty much everything at US for the first hour and then there were 15 minute waits for all the rides for another hour Seemed like when we were leaving for a break at around 1, the parks were getting really busy. Around 7pm(when we came back), things were dying down again with shorter waits. Of course, it was our first time, so I don't know how busy it was except to compare it to Disney, LOL
Marsha