Chattersly was saying that it might change some theories of NA migration.
I have read about some interesting DNA studies that indicated there was some gene present which is found in Europeans from Spain and Portugal. There's also the Solutrean points and Clovis point similarities.
Lingustic studies indicate that the degree of differentiation between the several families of Native American languages might have taken up to 40,000 years to achieve and the center of linguistic differentiation was along the western coast of the U.S. All of this stuff is really very fascinating.
Some Native Americans have a hidden agenda in blocking these studies as they claim their ancestors were always in the Americas and anything which might refute that should be surpressed or couldn't possibly be right. Obviously these people are totally wrong.