Crowds are great (small) untill the 20th, then forget it. It is packed the week of Christmas through New Year's. We are going the week before, the 12-20th, then I don't want to be anywhere near there. Of course, many people love the crowds and festivities and longer park hours. I'll take quiet and uncrowded anytime. Easter week is a similar madhouse. I just don't see why anyone would want to subject themselves to 1-2 hour waits for even the minor rides or attractions. Last year, the week before Christmas week, we did not even use a fastpass all week. Now, you have to plan properly, and pick carefully which park to go to on which days, arrive early, etc...You can do twice as much off-season, even with the park hours much shorter. Anyway, if you are one of the people who thrive on crowds and chaos, I hope you have a wonderful time. Christmas is a wonderful time to see the parks, but I choose to go before the masses arrive, and have been doing this regularly. Now, I have been when the parks were packed. Never again.
Ricky