I had to laugh to myself when I read it as I had seen the exact same claim made on a number of websites and wondered about them. The story goes like this: Running shoes are supposed to be bad for runners as they limit movement and this weakens the muscles. This is supposed to be what causes all the injuries that runners get. Therefore running barefoot is better. I never really believed all those stories I was reading as those that make them clearly came across as zealots, nutters and fanatics.
It was good to read the above blog post as it just confirmed that what I had been reading was written by nutters and fanatics trying to convince gullible people. They were obviously peddling snake oil. I will stick to my running shoes and sleep easy at night.