I keep expecting to see a similar article about other groups.

I keep expecting to see a similar article about other groups. Back in the 90s there was an article by a mathematician (not a geneticist) that claimed everyone of English descent is (probably) no more than 30th cousins to everyone else of English descent, and everyone descended from pre-1850 American immigrants is (probably) about 13th cousins to everyone else.

http://news.yahoo.com/oy-vey-european-jews-30th-cousins-study-finds-154451884.html//cdn.embedly.com/widgets/platform.js

“For years, the favored recipe for making a modern European ​was this: Start with DNA from a hunter-gatherer whose…

“For years, the favored recipe for making a modern European ​was this: Start with DNA from a hunter-gatherer whose ancestors lived in Europe 45,000 years ago, then add genes from an early farmer who migrated to the continent about 9000 years ago. An extensive study of ancient DNA now points to a third ingredient: blood from an Asian nomad who blew into central Europe perhaps only about 4000 or 5000 years ago. This third major lineage originated somewhere in northwestern Asia, perhaps on the steppes of western Asia or in Eastern Europe. This is a “ghost lineage,” because no pureblood member of this group survives today.”

http://www.sciencemag.org/content/345/6201/1106.short//cdn.embedly.com/widgets/platform.js