I was thinking of your earlier question to me when I read this late last night.
Also, I wonder how this relates to the Jomon - Ainu types...and, how Kennewick Man and Spirit Cave Man (types) are completely left out of this article.
I should think that Kennowick Man theory as presented in the book of that name is well centered in this article's premises. Did not the local scientist who did the first carbon 14 date sample extraction say that what we now call native American seems to be a gene pool less than six thousand years old?