I'm not completely sold on the method, but the problem of subconscious bias in hiring is very well documented:
* Resumes with stereotypically White names receive 50% more callbacks than identical resumes with traditionally black ones. The addition of honors and special skills had a significant effect on the likelihood of White applications being called, but a statistically insignificant effect for the otherwise-identical African-American ones. http://www.nber.org/papers/w9873.pdf
* Applicants with male names are rated as more competent and offered higher starting salaries than identical applications with female names. Identical resumes with male names are called back more often than female ones. http://www.pnas.org/content/109/41/16474.full.pdf+html, http://advance.cornell.edu/documents/ImpactofGender.pdf
* Initial subconscious bias is logically justified post-hoc—in the linked experiment, the qualities deemed necessary for a position would actually be redefined by the person reviewing resumes depending on the gender of the applicants so that the male applicant's traits fit the position better. http://www.socialjudgments.com/docs/Uhlmann%20and%20Cohen%20...
There's quite a few more papers on the subject, it's easy to search for them. Depressing read all around.