IMSHO, the conclusions are built to fit the underlying assumptions, so, worthless. I'm surprised these kinds of studies aren't seen as deeply offensive to the tribes and quasi-tribes in North America, since they use DNA samples, and there are *no*, as in *zero*, folkloric tales describing the supposed trek across Beringia (the modern name for a now-subermeged area) or tales about the vast ice (the folklore of the fimbul-winter still survives among Scandinavian peoples).
