We just got back Saturday May 6. It did seem kind of crowded, although probably not as bad as it could be. Some of the bigger rides had lines around 60 minutes or so. We used fast passes though, so it wasn't a problem. My parents waited in the Jungle Cruise line for 1 hour or so. I'm not sure why they didn't FP that one. That was during the middle of the day or so. Dumbo and Peter Pan had long lines it seemed. This was our first trip, so it is kind of hard to gauge if it was crowded or not as compared to other times. We had a 2 year old with us who wasn't tolerant at all, so that kind of jades my opinion of "crowded" and the length of the lines.
I can say it was incredibly hot. It was in the 90's all week last week (except maybe the first couple days we were there). Couple that with my 2 year old who was clingy and only wanted me, and wanted me to hold and carry him all week - it wasn't too pleasant. Our own fault for bringing him so young though. I can't even imagine going later in the summer, it was pretty hot and crowded already.
Shauna