Of course, that would include the Altai region, along with others. The Siouxian ancestry in my family line came to the Dakotas and Rocky Mountain states from the Ohio Valley shortly after the turn of the last millennium. Before that, they were in what is now Virginia and the James River area. Before that is anybody's guess.
From what I have seen of DNA testing, it is highly accurate for a few hundred years, maybe a little more. After that, events which brought about cultural blending inject so many additional variables into the mix that the line between science and speculation becomes rather blurred. Just look up Kennewick man as one example.
Thanks for adding some common sense to the discussion! People can get over zealous when they think they know something.