Universal is always decorated by the November 10th, 5 years I have gone on my birthday and last year was the exception. It wasn't decorated the 10th, they were filming something in that Alley where the Blues Brother show was, and that might have been why no decorations were up. Also the fact they didn't have their Macy's props yet.
But 4 years in a row on 11/10 the parks are decorated.