WDW's attendance is a closely guarded corporate secret. Even organizations such as TEA, supposedly the best public source for attendance at most theme parks, gets it wrong. Sometimes by a lot.
Can a casual WDW guest tell whether 45,000 or 50,000 people attended the Magic Kingdom today? How about 23,000 or 25,000 at DHS? Yet the difference between these numbers spread out over 365 operating days represents a profound impact on corporate revenue.
Several methods are available to estimate crowd levels. However, even well-tried methods used by experienced hands come up with wildly varying estimates. Estimates for rallies held on the National Mall often vary by hundreds of thousands.
I'm suggesting that trying to project a sufficiently accurate estimate to truly understand what's happening at the macro level at WDW seems to be beyond current technic. While I think it's possible to come up with gross estimates, these have sufficiently large margins of error that make it difficult to truly comprehend trends. Is WDW attendance up 5% or down 5% this summer? Again, I'm suggesting that the margin of error used by any estimating technic drowns out such variance as nothing but noise.
Yet, corporately, up 5% vs. down 5% represent two very different business cases at WDW.