My husbands first trip to WDW was during our honeymoon, early May 2005. Having mostly gone during Xmas, I was surprised at how little we had (if at all) for things. Later that same year, 2005, my mother took us the day after Xmas, and it was awful! I couldn't see anything. I couldn't even cross the street! Not only were there so many people that I couldn't shop, but I couldn't even leave the store!!! I couldn't even call family members to tell them where I was because the network was so busy! To avoid getting split up, we all, grown adults, held hands everywhere. It was the only time I have ever held my brothers hand.
As you can imagine, the rest of the crowd probably hated us for it, but out of all the broken up families, we had all of our members. One family had their child left behind when the commuter boat left the dock. A CM told the family that he could catch the next boat, but when they learned the child was 6, they went back for him.
Anyway, my husband will tell people that if that were his first trip, and never went that May, he would never ever go back. We have since then gone back two more times, three come January, and that doesn't include our trip to EuroDisney. But never again during the holidays