I thought there was an article a while back that clearly stated he had a large disadvantage. IMO he does have one, and a big one at that. Emotionally, it is a great story, and I hate to be the bad guy, but I dont see it as legitimate. The quicker response and transfer of the gct forces, and difference in fatigue factors, just seem to be all in favor for him. I mean we all know that tendon stiffness is of great importance to sprinters especially the longer sprints, and my guess is the stiffness from those “blades” are far superior to the human body.