We just got back tonight after being at WDW for 6 days. The crowds were quite low compared to summer (July and August), Easter and Christmas trips we have taken. We were there last February 6 - 13 and I'd say that they were almost the same as then. We were very worried about the crowds yesterday (MLK Day) at MGM, but they were lower than our trip this past August 21-27. We hopped to Epcot after Fantasmic last night to see Illuminations and it was not that crowded either. We were at MK Thursday and Saturday. Saturday was a bit more crowded than on Thursday, but the crowd was still very manageable. We got to ride all the rides we wanted to with minimal wait times....most had 5 to 10 minute waits. The longest wait we had was for Splash Mountain and that was 20 minutes. We were at Epcot Friday and AK on Sunday and they were not that crowded, even with Epcot having EMH Friday night. We got to the parks at opening and used fast passes a lot which really helped with getting on everything we wanted.
The weather ranged from the upper 50's to low 80's.