Running shoes are funny things. Due to the fact that they are basically a weight at the end of a long fulcrum, the heavier they are the slower you will go. Plus they are full of padding which messes up the natural springs you already have built into your feet.

It is not surprising someone invented a shoe that is somewhat lighter which makes it faster. I find the spring idea somewhat dubious but maybe they do give you a slight boost. My question would be how fast you can run in these vs with no shoes on at all.