What is wrong with athletes taking on extreme endurance challenges? Simply running for fast times, by athletes who only run 1-2 marathons/year, is what I consider boring. Even more boring is the fact there's a gazillion Africans now doing it, yawn. If you don't think watching Kawauchi grit his teeth through his 11th marathon and another sub-2:10, you need to think about broadening your perspective on life and challenging the human body. Speed is only 1 talent.
Furthermore, Jon G. is like a typical Letsrun message boarder who's personified in real life as a cynical journalist- the only difference being that he uses his real name, which takes a bit of cojones. Not too many athletes are going to like this (understandably), but at the same time Jon needs to learn to write respectfully.