We were there for Thanksgiving this year...we did MK first thing in the morning, wasn't too crowded till about 12 noon. We have 6 kids & HATE crowds.
Then we went back to the resort for a break, EPCOT that night ...dinner at Coral Reef...World Showcase after was empty!! It was great! Would have been a little better if it was a little warmer, but it was still better than the snow we had back home!!
All week(even before t-day) we thought MK was more crowded than other parks. Sunday, our last day, MK was empty! Nice way to end the trip.