I applied Ortho, with board scores about >15 points higher than the ortho average, and I'm URM. I didn't get an interview to one place that claims to "promote diversity." I.e. Harvard, Iowa, NYU, Mayo, and there might be a couple others.
I know a guy who interviewed Gen Surg 2 years ago in the mid-west and was told by a PD that he had a great application... but that he'd probably find it difficult to fit in with their patient population and residency class.
That being said, I know there are a couple programs who truly care about having a diverse resident class, but that's rare. Within Ortho, I can probably count on 1 hand how many current resident classes actually reflect this.
All that to say, no, being URM overall doesn't matter in terms of residency. PDs want to have people who will be able to handle the load and then people who get along with each other, generally speaking irrespective of what color you are. Of course, there are stories on both sides of the table where being URM will help you, but equally as many IMO where it can hurt you.