Funny you should use that particular date, because I was there for both of them that night. It was extremely cold last year, and close to freezing that night -- my daughter was in the Twirlmania parade and it was so cold they had to put them up in the CMs dressing rooms before the parade. So the parks were super crowded during the day that weekend and much much better at night.
So you're saying other people have an agenda, yet you only showed 4 rides -- all rides that had longer reported SB times last year on one particular day -- what about all the other rides in MK? And you use one day -- yet Josh's data is over 60 days. We rode PoTC right after the parade both years because that's the gate where we pick the girls up -- after 10 pm last year the SB wait was only 10 minutes, which we figured was kind of long because it was an indoor ride and nobody wanted to be outside. This year it was 20 minutes but we used a FP, as did a lot of the families who were affiliated with the parade -- I actually don't know how long people got stuck in SB because of us

So there are two things that can throw your data off if you only look at one day.
Btw, it was so cold that night that I had to scrape the ice off my windshield the next morning.