Actually it's this site that is obsessed with mega-miles, Lydiard style training. They always point out such and such runner improved because he/she increased their base volume (and stopped lifting weights or cut back on plyometrics). This guy improved because he was doing "marathon training" (Ritz, Solinsky).
This site hardly ever points out that a runner improved because he/she cut back on their volume or put more emphasis on speed work, strength work, etc-which can certainly be the case for milers/1500 runners (and is the distance more relevant to high school runners-there are no 5k's and 10k's at high school meets).
This site does not look favorably on the 80's style of training of Frank Horwill, Peter Coe, Sam Bell, Peter Tegen that emphasized speed and speed endurance and eschewed "junk miles". There is a feeling that this philosophy caused the "dark age" of high school distance running of the 80's and 90's when the linear progression/improvement of times & depth from the 60's and 70's seemed to have stopped.
But most importantly with the internet, running has become a way for a teen to become "popular" (the "Webbmaster", "AJ's army"). Race results are everywhere. Back in the olden days you were lucky if your results got printed in the newspaper and you were able to get a hold of that newspaper on the day it came out. Plus saying you did a ton of miles sounds impressive on their social network sites.
My personal feeling is that in order to "fit in" in this internet running community you have to at least SAY you are doing a lot of miles. My gut feeling is that the training of most high schools are very similar to what was done in the 1980's. Speaking to the kids at all comers meets, most of them hardly go longer than 10 miles on their "long run".