I'll just add to this too that Josh from EasyWDW recently had a whole blog post about wait times and he said this (after a really deep dive into the information Touring Plans provides) about the information they share:
"As recently as last year, TouringPlans was using data stretching back 8+ years in their predictions. And while you might initially think, “the more the merrier,” the fact is that putting any weight whatsoever to wait times before FastPass+ came online in 2014 makes absolutely no sense. Spaceship Earth’s wait times throughout 2013, when it didn’t offer FastPass+, are irrelevant. Yet, TouringPlans was still using that data in their predictions up through April 2018. Using those lower wait times from 2010, 2011, 2012, 2013, and 2014 is going to produce predictions that are too low. The same thing is happening with their Animal Kingdom predictions. Even if they only used January 2017 and January 2018 wait times in their wait time predictions for January 2019, that still means 50% of the data used comes from before Pandora opened."
So, while there are things I truly like about TP and why I have a subscription, TP isn't as "scientific" in their approach to data as they lead people to believe.I give little weight to what they say a crowd is going to look like on a certain day. The truth of the matter is that no one knows (except Disney and they're not sharing), but you can glean from information leading up to your dates or from the recent past what you may be able to expect. But to plan your whole vacation around it? That's just asking for disappointment, IMO.