We were just at the moonlig madness at MK on Feb 6th and it was fantastic. Hardly anyone in the parks. Most rides, other than things like Peter Pan and 7 dwarfs were a walk on. They even had an awesome firework show.
My wife asked me if I was going to start planning all our trips around these events. If possible, I certainly would.
Looks like I'll be able to go try and go to EPCOT in Aug now that the date has been changed to the 15th.