Eric Ries claims to have had "shocking" results when having recruiters remove all demographics from resumes. His suggestion for YC:
I suggest the following experiment: for your next batch of admissions, have half of your reviewers use a blind screening technique and the other half use your standard technique, on your first screen (before you’ve met any applicants). Compare the outputs of both selection processes. I predict they will show different demographics.
http://techcrunch.com/2011/11/19/racism-and-meritocracy/
Obviously YC needs to interview applicants, but as it already cuts people before the first interview, it might be an interesting experiment.