Any distance longer than 100m seems too far to me...not fond of running!
Just as a point of clarification: The original statement from Coach Glassman was (paraphrasing here) hitting the DL~1x/week amidst general training, typically at high heart rate and only pulling max efforts a few times each year.
He provided a bracket of 500-750 lbs which has caused some incredulity among many folks. On that topic I saw a specific individual pull a 695x2 DL like it had helium in it. This guy is not your average schlep...but that is where THAT claim came from.
I have certainly benefited from high rep OL's, can't say I've seen direct effects of KB's although I've never delved into them exclusively for that long.
"Survival will be neither to the strongest of the species, nor to the most intelligent, but to those most adaptable to change."