I'd like to point out that my original comment, which prompted this line of discussion, was never about an entire specialty. It was about particular programs within each specialty. Specifically, particular programs within my specialty. I try not to comment on all specialties in general, because I want to emphasize the fact that it's hard to know what is what if you're not in a certain field. But my point was that there are programs out there that I know for a fact have taken applicants with scores well below average, while filtering out all DO and IMG applicants without regard for scores or anything else. I mention it to disavow you of the notion you have that a DO student who scores a 260 has overcome the bias that is out there, and will have equal, if not better, opportunities compared to a Harvard or even ETSU* student with a 211. Fair or not, it's just not true.
Luckily for everyone, this disadvantage rarely even matters. Most applicants want to receive good training that will prepare them for independent practice. Period. There are tons (tons!!) of programs that give the opportunity to do that. For those rare applicants who want to become an infertility specialist to the stars, or chair a top-ranked department one day, the disadvantage comes into play a little bit more. For those applicants who won't be happy unless they land the ENT residency that will get them to the #1 skull base surgery fellowship, I imagine it becomes a bigger deal. What doesn't help the situation is when people refuse to believe that the disadvantage is there at all. That is what I'm trying to counter.
*Quillen is a fine place, and I have lots of respect for their department. I use it as a decidedly "non-Harvard" example to make a point.