Magness is obviously very passionate about running and seems like a generally decent guy. I just feel that he used to read so much into every detail of every type of training that he could find on the Internet to the point that he sort of just lost the wood for the trees and was ocasionally mislead.
A few years back he was discussing training ideas written by Antonio Cabral without ever really checking up on who Antonio really was - a serial epic BSer who was notorious throughout the Portuguese running community for his lies and worse than useless coaching:
Trying to follow someone like Antonio's training will inevitably lead a runner to fall very far short of anything close to their potential. There are probably other examples of where Magness has been mislead in the past but maybe with more experience and maturity he is now much more astute in analyzing the training of other coaches.