On Christmas night my family took a carriage ride at Fort Wilderness. Our driver told us that there were 74,000 people at the MK that day. However, right before our ride, a CM working in the trading post told me that it was 86,000 people. I know, the 12,000 people difference is quite large, but I'd venture a guess that the attendance was somewhere near 80,000 on Christmas day. I hadn't heard anything about Epcot on NYE however. We were there for about 2 hours that morning and then left after seeing the fastpasses for Mission: Space and Test Track dissappear at 11 am and noticing a 4 hour and 20 minute standby line for TT. It just wasn't worth it, so we went to Clearwater Beach for a dip in the Gulf. I know I didn't really help much, but I thought I'd pass along what I head about X-mas day.
Bryan