We made it back down to WDW January 6-16, we caught the marathon but were out before MLK weekend. When we arrived the crowds were non existent, in the am we would breeze right in the MK, like no one was in Adventureland, through Frontierland and Fantasyland. We road things we never would have waited for with any kind of line, Magic Carpets, Jungle Cruise. All walk ons. The aprks would start filling up around noon but not too bad in the beginning of our stay. EPCOT and Studios were about the same, really a lack of guests and told wife, we're all alone in all this Disney Magic. As the days moved on, the guests must have sensed the emptiness and started to fill up the parks sooner. Evening we quite crowded, EMH at the MK , was packed but doable for strolling. Marathon came and went with alittle increase in guests, we were at the WL, our perspective, and closer to MLK it was getting quite full, glad we were leaving too as the temp took a big drop too, left in the low 60's.
This was our first time in January, it was okay, temp wise, crowd wise but leaving Ohio and returning to the cold, really sucks. We actually prefer the October, November months during valve season better.