Newton clearly, clearly had a gift. Great leader, great motivator, very charismatic, knew how to build a program and have kids progress.
But I do share the concerns about how many miles he had his kids run. Some kids could handle it, and did great. Lots of others couldn't. I don't know how he handled those kids. If he let his less durable or often injured kids run less than 80-100 mpw as seniors and still be part of the JV squad, more power to him.
My issue is with the meat-grinder programs that make all kids, regardless of durability, run really high mileage. I don't know if Newton was like that or not. I know he made sure not to bring his freshman and sophomores along too quickly, which I respect.
I would be interested to hear from people who know the York program well how that would be handled. Let's say you've got a kid with OK (but not varsity -level for York) talent, maybe runs a 17:00 for 3 miles. He's not really durable and gets injured frequently but wants to keep running. How would York handle that?