150 miles a week all at 6 minute pace, his pr's aren't slow by any means, but I can't help but think that he would be faster if he trained a little differently.
He's a grinder, that appears to be what makes him happy. You could always try messaging him on that SM platform rather than gossiping about him here.
Actually he explains why he trains the way that he does in this interview:
The bottom line is that he knows it's unconventional but it's how he likes to train and believes that it works well for him.
This is a pretty cool article about him by the way: