The difference is that olympic long jumpers get to the pit via mechanized transport. The frogs on the otherhand get to the front line by using their legs.
You're getting smarter Bob, now you should be able to look at your explanation and see why talk of evolution in this regard is laughable. The long legged among any species should be able to walk faster, but that fails to prove an advantage in getting there, and has nothing to do with evolution. What if they have advanced to their own destruction?