Ditto.
Was at WDW this year from Sep 6-10 and the crowd levels were extremely low. The longest we waited for anything all trip was 45 minutes for Astro Orbiter one night, and that was only because it was after 11 and they only had one CM up top.
Touring plans was ranking certain parks as 1s to 3s and it felt it.
Keep in mind when planning your vacation that crowd levels at the various WDW parks are rarely uniformly high or low- they tend to fluctuate depending on which park has extra magic hours and/or whether or not Wishes and/or the main street electrical parade is showing at the Magic Kingdom. In general, the more "special" stuff going on at a park, the better idea it is to avoid it.
Consult your crowd calendars. They're usually right.
http://www.undercovertourist.com/planning/when-to-visit.html