I will admit it amazes me how many people it seems post here about WDW, and don't seem to have kids, or if they do, they certainly don't seem to post like they do.
Sure Florida is hot. It was hot when we were there last 4th of July, and hell, it, was hot when we were there for Halloween 2 October's ago. But as almost every parent i know will tell you, people with kids change their plans all the time. Someone has a stomach ache on a certain morning. We were out late the night before and kids missed naps or couldn't fall asleep....because they are so excited about being at Disney. Or yes, because even thought everyone knew it was going to be hot in July, come noon time the heat is just too much and the kids are melting down, both figuratively and literally and mom and dad could use a frozen blueberry lemonade vodka back at the swan and dolphin, as opposed to a couple more hours at the park. I mean do people really just pack up their 5 year olds and drag them along through the park until close because "you knew it was going to be hot in the summer?"