That's very interesting. When I ran the snp tracker tool
http://scaledinnovation.com/gg/snpTracker.html for one of my SNP's (I used R-U106) it showed a path that went thru eastern Siberia (SNP P-M45) that has an estimated age of 35,000 yrs BP. I think the site in this article is much further north than the path the tracker tool shows. I'd be curious to see any DNA results from those teeth.