Pretty much by the end of last week, all the parks had their Christmas decorations up. One day we were at MGM and they only had a little bit up. The next day, it was all up (in time for the Super Soap Weekend, no doubt.)
I'm not being a Scrooge, but I really was not wanting to see all that up during the first week of November (it's bad enough that all of the stores have stuff up the first of October), but realize that they have so much to put up and can only do it during the closed hours.