I am not sure if there is information on what is happing at Wide World of Sports, I never looked into it. We were just surprised to find our resort filled with lots of high school aged girls, the parks weren't bad that is why it was surprising.
That specific trip was 2002, but we arrived on Tuesday of President's week. Week days are usually much less crowded than weekends. There are some schools, I have learned that have a mid-winter break in February. ( I'm thinking its primarily in the Northeast, but I could be wrong about location, I am mostly familiar with Texas, and North Carolina)
2010, I thought that I was going for a little heavier crowds when we went and stayed over Veteran's Day, I was so very surprised, I have never seen the Magic Kingdom as crowded as it was. It took me 45 minutes to get from the baby care center (by the Crystal Palace) to meet my family by Monster's Inc. Laugh Floor, it was that crowded, no parade, just a lot of people. I have often made that walk at a leisurely pace in about 5 minutes.
I you don't have school schedules to work around, it is so much easier.