We were there this past week 1/1-1/4.
Saturday 1/1 at AK: arrived at 8:00 PM when park opened. we had virtually 5-10 min waits for everyting in the morning until about 12:30-1:00 PM when the park started to get crowded. Went to Epcot for late afternoon/evening, very pleasant crowd wise.
Sunday 1/2 at Epcot: arrived at 8:30 for 9:00 AM opening. Unfortunately they did not open until right at 9:00 AM. 5 minute wait for Mission Space and Test Track. By 10:30 there was 30-40 minute wait for TT. Crowds were manageable most of morning & early afternoon. Went to Magic Kingdom in the evening: crowded as heck! 60-70 minute waits for Peter Pan, etc. What a zoo! It was a mistake going there in hindsight. Left and went back to hotel
Monday 1/3 at MGM: Arrived at 8:30 AM for 9:00 opening. Again, did not open early. First in line at Tower of Terror, then waited 5 minutes for Rock n Roller Coaster. Did Little Mermaid with no wait, Indiana Jones Stunt show no wait, 5 minute wait for Star Tours, walked onto Great Movie Ride, 5 minutes for Muppet 3-D. By 2:00 PM only a 30 minute wait for Rock n Roll, so not that bad of a crowd. Fantasmic show was still jam packed though.
Tuesday 1/4 at Magic Kingdom. Arrived again 8:30 AM for 9:00 opening. DID not open early, Darn! Went straight to Space mtn, walked on, went back to Thinder Mtn and Splash Mtn, 5 minute wait, did Buzz and teacups with 15 minute waits, Pirates of Car had 5 minute wait, Philharmagic walked on. By the afternoon it was a bit more crowded, with 30 minute waits for Pirates, 40 for Space mtn, etc.
Hope this helps.