We were there last July 28- Aug. 8th. Crowds were really bad until about the 6th of Aug. I understand that most states start school around that time with the exception of NJ & NY (there may be others). That would definitely account for the smaller crowds. You should try to shift your trip by a couple of days if you could.
We were there this past July 26-Aug 2 and I didn't think the crowds were that bad as compared to years past. There were times that was more crowded than others but in the early morning when it is best to be in the parks, the crowds were light, in fact, did every ride in Fantasyland within one hour. It really just depends on your idea of crowds.