I was there yesterday and it was one of the worst days crowd-wise I can remember in a long time in both parks. Once someone reminded me about Columbus Day and how every state except California has Monday off, it made more sense.
Ironically, I got to have lunch at the Magic Key Terrace (which I usually find hard to get into on the spurt of the moment), because apparently so many of the guests swarming the parks were not Magic Key holders. We ended up leaving the parks around 8pm to seek dinner in Downtown Disney, knowing that, if nothing else, Splitsville is always available as a walk-up. Nope! Twenty minute wait for a table there, too! Which we took and had, as always, a fabulous meal, but the place was as crowded as I've ever seen it.