I think most people would agree that school size does matter - we’re just not willing to agree that it is the main contributing factor, which you’ve alluded to in your prior posts.
Just in Mason’s conference, Lakota West, Lakota East and Oak Hills are all large enough to be regular top 10 teams if they had Coach Rapp. Here’s a question for the statisticians; Someone claimed Mason should win every year because they had an extra 1000 “athletes” to choose from. How many sub-16 or sub-17 runners should be expected in 1000 students? If Mason has 15 runners under 17:00 how many can be attributed to those extra 1000 “athletes”?
That's actually really easy to answer. Let's compare Mason and Dublin Jerome, because the enrollment data was already posted in this thread, and they have very similar demographics and good resources, so we are justified in ignoring those as factors for a quick look at the data. Masons enrollment is 1300 and Jerome's is 736. [Note: this would be the 9-10-11 boys from the year the data was collected.] Which means Mason has approximately 1.7663 times Jerome's population. Which means, assuming talent is roughly evenly distributed and Mason has 15 under 17, you would expect Jerome to have about 8.5 runners under 17. That's the quick look at the numerical advantage over Jerome.
Let's compare some of the OCC schools in Central Ohio, because I know they have adequate resources and competent coaches. As well as a sports culture that doesn't make it hard to recruit cross country runners.
Coffman (730), Liberty (722), Orange (744) are all about the same size as Jerome, so similar ratios compared to Mason.
Scioto (512) and Kilbourne (528) are at about 2.5 for their ratio, so you would expect them to have about 6 sub 17 compared to Mason's 15.
Lancaster (678), Thomas (655) and Westerville North (606) are in the 1.9 to 2.1 range. So you'd expect about 7.5 sub 17.
Gahanna (the biggest of the OCC schools at 948) has a ration of 1.37, so you would expect about 11 sub 17 runners using Mason as the standard.
If I get motivated (and honestly this is starting to lose its appeal as a topic for argument) I might look at the last decade and get an estimate for the standard deviation for average number of runners under 17 and then look at the probability of any given school having 5 under 17. But just examining the data we have shows Mason is actually much more likely, from random chance, to have 5 under 17 (and even higher difference in the chance of 5 under 16) than all but maybe Gahanna of those OCC schools, given adequate resources and good coaching.
None of which means that Mason's coaches are not excellent coaches. None which means, as some (and yes this too is insulting) kind of imply, that just anyone could win titles coaching at Mason. It does mean that when you say "It's more about the coaching than it is about school size" in the context of a discussion about who will win the state cross country meet, where most teams present have adequate resources and competent coaching, you are implicitly saying "Those Mason coaches are better."