Okay, I'll bite. (But only because I'm trying to work off the two and a half pots of coffee I drank today;^) )
The article is written by the author of a book that is to be released on Thursday. It's a fairly blatant advertisement for the book in which he appears to be keen to create as much controversy as possible. He doesn't seem to actually cite any studies that support his premise, which appears to be that expensive running shoes CAUSE injury.
I've flicked through the article a couple of times, and the only study I see mentioned is the Australian one
"In a paper for the British Journal Of Sports Medicine last year, Dr Craig Richards, a researcher at the University of Newcastle in Australia, revealed there are no evidence-based studies that demonstrate running shoes make you less prone to injury. Not one. " Fair enough, but this doesn't prove that they cause injury
"Dr Daniel Lieberman, professor of biological anthropology at Harvard University, has been studying the growing injury crisis in the developed world for some time and has come to a startling conclusion: 'A lot of foot and knee injuries currently plaguing us are caused by people running with shoes that actually make our feet weak, cause us to over-pronate (ankle rotation) and give us knee problems. "
A quick look at Dr Lieberman's CV here
http://www.fas.harvard.edu/~skeleton/DanLcv.htm
lists over $3,000,000 in grants (okay, I put that in to make him sound impressive. $2,632,062 of it was for "Integrative Human Evolutionary Biology." But there's easy another mill there) and 77 published papers.
By changing the year and the letter after it, you can browse his articles here.
http://www.fas.harvard.edu/%7Eskeleton/pdfs/2007d.pdf
I'm pretty sure if there were actual studies to support his startling conclusion, he'd be able to reel them off.
It's interesting that the very first person the article mentions (apart from those two nameless Nike sales reps) is Vin Lananna and how he gets his athletes to train barefoot. "When I was told this anecdote it came as no surprise"
He seems to miss the part about how they're running barefoot on a golf course. At least that's how I remember the anecdote going. That's the nice thing about anecdotes, they're always right, even if they don't always agree. He DOES mention that the Nike research team observed their 20 subjects running "on a grassy field"
So although his points may be perfectly valid, it's probably reasonable to take it all with a small grain of salt.
Maybe expensive runners are over priced and Roger's KT26s really are the duck's guts. But unless you've been walking barefoot through the desert since you were a toddler, showing up to do the Badwater in a pair of thongs may be poor gear choice.
Disclosure
Flat feet since I was a baby
Run about 30 km a week
Occasional plantar fasciitis
Orthotist for the last 16 years
Coffee has now worn off