There's a new WSJ article on the super shoes and it has 3 interesting tidbits on Saucony athletes.
1) The article says Jared Ward got a 4.4% economy boost from the shoes.
2) The supershoes may have contributed to Molly Huddle's injury
2) Molly Huddle does not appear to be much of a responder (my words not theirs).
Article says, "The new wave of shoe design doesn’t work for everybody. Saucony-sponsored Molly Huddle said that in lab tests with the Endorphin Pro, “I did get a little bit of an economy boost, but not as big as some other people did.” The thick soles also irritated weakness in her ankle, she said."
So that is what Ross Tucker pointed out and that some people may be responders to super shoes and some aren't. Unfortunately if Huddle isn't she might be at like a 2-3% time disadvantage in the race.