I've been at WDW the very first week in January for several years (BWV 1/1-1/6 in 2005). Only thing is that if there's somthing you really want to see, get there fast! It's amazing to me how quickly decorations come down once they start. One year I went to Epcot on 1/2-saw the giant Christmas tree, the arch of lights, etc. Two days later-poof! Everything was gone-I didn't think all those decorations could be removed so quickly.