Not sure of "CA Syndrome" but i am from CA the valley, ran in the 70's and there were alot of people who were really good and competition was pretty fierce. My HS had the top cross country program based on the number of City titles at the time. Most of the runners i knew did pretty well when they were at 50 -75 miles, even including LSD.
However since SoCal was loaded with the guys running sub 4:12 miles, close to 9 minute two miles, guys would take chances ,push harder and blow up.i know because i was one of them.
Tabori coached alot of guys in high school and college who did the same thing as me and paid the price. He seemed to have more success making good runners out of not so good runners and helped elite runners stay sharp, but not so good at taking the 4:12 guy and taking him down close to 4.
When i got to college i got some good coaching, learned that trying to run 100MPW was not productive for me and alot of other guys and in fact ran much better with quality workouts that were well planned.
My coach was an Olympian & American record holder in the 40's and they ran nowhere near 100MPW. He didn't believe in it and thought it hurt the better athletes.
HOWEVER if you have a lack of athletic ability you can gain enough fitness top go from 12 minutes to a sub-10 2 mile. Or a 4:40 mile from 5 and a half, just by churning out the miles.
I think guys who did well on 100 MPW are as much an exception as the guys running very low miles.
There were alot of good runners in the 60's & 70's in Socal and one of the reasons is the way we were raised, we played outdoors constantly as kids. We lived in the hills so that is where we played. So we all had a good "base" before we ran competitively.
My neighbor was All City in Basketball 6ft 5 and even he ran a sub 4:40 mile as a senior. The Coach made the whole team run the mile and to make the team you had to be sub 5. Most of the guys ran sub 4:50, the few who didn't break 5 got another chance a half hour later. All 12 made it by the 2nd attempt.