We're planning a trip for mid-late January and here's my best guess.... FD is being offered for a lot of 2011 IMO so I don't expect the crowds to really be different. However I think the dining places (both TS and QS) will probably be busier than in previous years and more people will stay on site so buses might be more crowded.
I still think it will be a quiet/ non-crowded time overall.