Even though I want through the little questionnaire, I couldn't get the article to come up. What is it about?
On the subject of ancestry tests and accuracy, it seems that outside the medical/scientific approach, which looks for genetic evidence, there is another approach that also is important (and unrelated to the DNAP ancestry test). That is, what has someone's subjective racial experience been? For example, if a person grows up in an African-American family and community and identifies as black, but through an ancestry test discovers she is 5/6 white, other than for medical reasons should it make any difference to her? Social experience has formed her self-conception, and the biological definition was not part of that. Of course, in the future if such tests become common, they may be able to radically alter social experience by imparting a biological racial identity early on. Any science fiction writers here?