Maybe people were reading science publications.
“Bejan and Jones cite past studies of the human body which found that on average, the center of gravity is about three percent higher in blacks than whites. Using this difference in body types, the researchers calculated that black sprinters are 1.5 percent faster than whites, while whites have the same advantage over blacks in the water. The difference might seem small, Bejan said, but not when considering that world records in sprinting and swimming are typically broken by fractions of seconds.”
http://www.sciencedaily.com/releases/2010/07/100712103349.htm
Interesting, my grandmother who was extremely high waisted always said she swam just like a rock. The rest of the family is all “normal” and all swim like fishes. Don’t know if that had anything to do with anything but an interesting piece of info.
If not, your point is non-responsive to anything I've posted.