We were there 6/26-7/2, and never waited more than 30 minutes for anything, with the exception of Peter Pan when it reopened. Even then, it was posted at 60 mins from when we entered and I timed it at 45. As others have said, if you get there early, as in rope drop, the first four hours are key to getting a lot done. Utilize fastpass as much as possible, and also, if you are not a parade/fireworks person, lines are short on a lot of rides during that time. We rode Nemo after the fireworks, and literally walked right on. The rest of the day it was a huge line. Timing is everything. If you are a sleep in/go out to breakfast/stroll into the park around noon person, you are going to deal with lines at almost any time of the year.
Everyone's definition of crowded is going to be different though, so that will make a difference as well.
Everyone's definition of crowded is going to be different though, so that will make a difference as well.