This is an interesting idea for discussion, but I think the author handles it very poorly. Yes, it's entirely possible that high-end running shoes aren't helping us as much as we think they are. Yes, it's possible that there's a correlation between high priced running shoes and injuries. On the other hand, the author claims a lot of things that are simply ludicrous: "Logically, that should be obvious - the impact on…
An article by Adam Sternberg that appeared in New York Times magazine a couple of years ago does a better job at the barefoot question (http://nymag.com/health/features/46213/)