You don't have this evidence. You have evidence that masses of people are at WDW. Which is not the same thing. Those people could be experiencing a range of reactions from enjoyment to infuriation, but you don't have the tools to determine which. Disney does to some extent. They know why people are visiting Guest Services, but a lot of people don't, and just grumble the whole time. The real determinant is what percentage of people book future vacations compared to previous years and encourage others. Which is also data Disney has but you do not. Guests, especially first-timers can't register their enjoyment level before they registered as a gate click. Attendance is not a good proxy for enjoyment. Interest level, yes. People are interested in Disney Theme Parks, and as long as if people interested > people who didn't have a good time, you can hide all matter of sins from public eye.