Instead of making a juvenile joke, why dont you name a 5000/10,000 US runner who set a PR in the 10,000 on his fourth European race of the season?
You do nothing to back up any of your "objective" data, just some stupid theories on why Africans run fast. That, my friend, is called backpedalling through your own bullshit.
And how about some substantial data that back ups your idiotic "fact" that a 27:10 is equal to 13:10. Something other than "everybody knows."