Historically, the week before Thanksgiving has been a great time to go. We have gone that week for the last 3 years. Last year our dates were November 10-22. We always return home the Sunday before Thanksgiving, so I am not confusing the dates. 2013 and 2014 were great. We have been every month of the year and decided this was our favorite time. Weather, crowds, everything was great. Crowd calendars always showed low crowds. As long as we avoided F&W on the weekend we had a great time.
Then came 2015. Our first day was MK and it was difficult to move around it was so crowded. We figured there were a lot of locals since it was Veterans Day and it would get better. When the weekend came we thought maybe people stayed from Veterans Day through the weekend, it will be better on Monday. It never go better. We could not believe the jump in crowds from just a year before. We are not amateurs either. We do MK on party days, we get to the parks early, I research the best parks for each day, etc. It was so crowded it cut into our enjoyment. Even the kids were tired of all the people.
We have done at least one trip a year for the past 14 years, but half way through our trip we decided we would not be returning for awhile. The crowds were not the only reason, but it did put us over the edge.
It seems like there is no good time to go anymore so the week before Thanksgiving may be just as good/bad as any other week. If you have never been or have not been in awhile you may not think the crowds are that bad. There will always be people who will come here and say "I have no idea what they are talking about, we were there the same time and did not experience that". Everyone's concept of "crowded" is different. Also, 2015 was not the same as the years before. There are a lot of different views in this thread so I wanted to offer mine.
Eta I need to take out my tickers. They are old!