I'm going to guess it does have some degree of accuracy behind it, if you took 3 radically different people, like
The whitest possible Scandinavian sort
The darkest black guy you could find in Africa
And somebody else way genetically different like a Samoan or something
Send it in, see what they come back with. I'm sure it has been done. I think the flaw in this is they tell you where people with similar DNA to yours live TODAY !, Not hundreds of years ago, or 11,000 years ago. I'd certainly do this if it was free or maybe $20 or something trivial. I'm sure a bit of research would yield some decent results regarding the accuracy of these tests
The whitest possible Scandinavian sort
The darkest black guy you could find in Africa
And somebody else way genetically different like a Samoan or something
Send it in, see what they come back with. I'm sure it has been done. I think the flaw in this is they tell you where people with similar DNA to yours live TODAY !, Not hundreds of years ago, or 11,000 years ago. I'd certainly do this if it was free or maybe $20 or something trivial. I'm sure a bit of research would yield some decent results regarding the accuracy of these tests