Has there ever been any public data on MD/PhD programs though? I guess it's probably similar to MD-only, but I wonder if diversity is as important to MD/PhD programs.
I don't think URMs necessarily have more diverse experiences. It's just a category people are placed into, and the only thing all URMs share is that they're underrepresented. I guess when I mentioned the whole applicant, I was thinking about the fact that non-research areas of my application have come up as positive parts of my application during interviews. In one interview I had at Tri-I, my interviewer specifically mentioned my essays/writing style and some random non-medical, non-research ECs that caught her eye. In fact, we talked about numbers vs. other experiences, and she seemed to think that the rest of my application made me stand out more than a couple more GPA points would have. Of course, an interviewer is not going to come out and just say "Look, we want you because you're brown," but I really don't believe that my race is the ONLY or even necessarily the PRIMARY reason why I have so many interviews.
There's nothing wrong with discussing the role that race plays in admissions; I would call it realistic, not un-PC to bring race into the discussions. Otherwise, I wouldn't have brought it up.
I have to admit that it does bug me a little that I have to wonder how much my race has to do with my chances at admission. I'm not disadvantaged, and the color of my skin doesn't have anything to do with my success or lack thereof in any area of my application. I certainly won't feel guilty if I get into a good program b/c I'll know that I deserve to be there, but I will always wonder, as will some of my peers, I'm sure, how I would have done if I happened to be white.