But, I mean, if you are projecting a 2:00:00 finish in a future race, which presumably you will train for, and you last ran a 2:00:10, or even a 2:04:00, most people who don't crunch numbers as a hobby or vocation would assume that shows they could do it. And they are probably right in a lot of cases. I'm not saying that's what Disney does or uses, but I would bet a lot of people, who don't obsess over this stuff like the folks like us who come to this board do, would assume that would count as a "proof" that they can run a 2:00:00 in their next race. I know all runners are obsessive over their times and there is a world of difference in the running community between a 3:59:00 marathon and a 4:01:00 to lots of us. But they would be throwing a lot of people into that last corral and have tons of complaints to deal with at the expo if it was that hard-and-fast. Maybe they do but also I think you would be hearing more people complain on social media.
See and I viewed the POT as a seeding process by which it is something you've already accomplished and not necessarily a projection of what you could theoretically do at Disney since most people don't. Similar to the seeding process seen in other races like the Chicago Marathon. Although Chicago refers to it as a "verified qualifying time" (
link) for the purpose of corral assignment. But reading the language on runDisney's site for POT, I can definitely see your view point as well. Where it's a means to show that "if you believe you will finish the event in less than X". Not necessarily something you've already accomplished.
As for the change in standards for corral placement, my personal guess is that they have some data that shows that there is actually little correlation between anybody's proof of time from "local" races and how long it takes them to finish a Disney race (because people stop for characters, rides, drinks etc., leaving out people who cheat the system) and that the fastest corrals showed a bit better correlation. So why do all that work verifying and waste time & money for the slower corrals. Billy I do think you have data on that somewhere though, on how long it has taken runners compared to their projected time via corral placement, so you would know if that's a possibility.
Here is some data from a 2018 Tableau (
link). The page I think would most likely answer this question would be the following:
I used that data to determine what percentile of each corral had finished by their projected POT finish time, as well as when the 50th percentile had crossed the line.
To me, the "Expected Finish time based on POT" is actually more consistent than I would have initially guessed. Runners in Corral A through E (<3:40 through 5:30, which I believe represented the actual POT corrals in 2018, and F, G, H were non-POT corrals) showed about 20% of runners in those corrals finished by the time the POT would have projected them to. The 50th percentile is relatively consistent as well, although there appears to be more of a downward trend starting from 55.7% working down to ~44%. So I would say the number of runners that do the race in the projected time is consistent (~20% of each corral), but the further back in corrals you go the more of a tail you start to see in terms of the average runner taking more time. But how much extra time those runners take evens back out after >2 hrs over POT (see Corral A 5:00-5:30 at 90% finished vs Corral D 6:30-7:00 at 90% finished).
So I think to go back to your original hypothesis, when it comes to runners in corrals running their projected time, the POT corrals all showed a similar trend. In general, even at its absolute best, only about 20% of runners hit the same time standard as their POT would suggest in a local race. But when looking at how much time (to a limit of +2 hrs) there is a trend with faster corrals on average using slightly less extra time. So I think the answer to your hypothesis is both yes and no. An easily useable data set to justify moving the POT standards from 2:30 down to 2:00 if it's a means to simply reduce workload of verifying POT since less than 20% of the field is running the race at POT levels.