That runnersworld link makes me utterly sick, they are propagating the myth that we are all inheritanly broken in some way and need fixing with the proper shoes, well we've managed to evolve to become the dominant species on this planet by running and we did this quite happily for 100's of thousand years barefoot or as good as. 40 years of shoe "Technology" has not made anyone more faster and could quite possibly be the reason why there are more and more cases of running injuries.
You only have to see how runnersworld is ad funded to realise why they still spout this stuff. Its the road to injury, ignore.