In case your wondering, not even the people who came up with that number stick by it now.
http://www.world-science.net/othernews/070904_human-variation.htm
Also, we don't even have an exact number of how many genes there are in a human, so I can't see how they stick a number to it.
Quite a few science types are now backing race as a biological reality, not a social construct, as it turns out we are not quite as closely related as they thought we were. There's only 2% difference between a Bonobo and a Human (by whatever odd method they used) and human variation is more like 0.7% (not 0.1%). So 0.7% would give quite a bit of variation, I'd say.
Bear in mind the famous quote..
"We share half our genes with the banana"
Source- Evolutionary biologist Robert May, President of Britain's Royal Society 2001
http://query.nytimes.com/gst/fullpage.html?sec=health&res=9C01E0DC1038F933A05754C0A9649C8B63
http://www.gnxp.com/MT2/archives/001313.html
http://raceandgenomics.ssrc.org/Hammonds/
http://www.dnawitness.net/cs.htm
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