Wow. Such an interesting topic.
I don't normally post, but being both black and female, the "miniority" issue is close to my heart. On my interview trail, the only place I came across black females was at Howard. Nonetheless, the lack of diverisity or minorities in Orthopedics is a systemic issue that clearly does not have one easily identifiable cause. But bias, does definately exist.
Ortho as a whole fails to attract miniorities from the outset because of its perception (and reality) of being white male dominated. As such, I think there are many attendings and faculty who fail to make themselves available to prospective minority students and vice versa because of a lack of preceived commonalities.
(2 examples: On my interview trail, one interviewer (a white male) told me he did not know how to interview a girl. (seriously, his words; he stopped short of saying a black person); second: Beer is not really my thing, nor are strip clubs, hooters and all other such places that the boys, and the reps and the faculty hang out after work to bond. I am not excluded outright, but you get the point).
I think most people who become interested in Orthopedics do so from not only having a personal interest in the field, but from also having that interest re-affirmed and nurtured. The fact that people inherently grativate to what they perceive as similar is not a shocking revelation. And in matching during residency, we always talk of the program and the resident having a "fit." So you take two students, of equal academic caliber; one white and one black (or hispanic, or indian, or female); and a white male program director; academics aside, he is going to pick the person who he feels will fit best in his already all white, all male residency. No surprise here - - its likely not going to be me the black female. Its not outright racism, but there is a bias; and to say there isn't is foolish and naive.
Diversity is not a bad thing: and it involves more than just race and gender. We owe our field the dedication to attract the best and the brightest; which I would dare to say is not simply in the form of white males. But because there are so many white males in Orthopedics, it is going to be up to them to value diversity enough to ensure that their personal practices are being inclusive of all who might be interested.
Just my two cents.