I served on the admissions committee for an institution that was a T10 school at the time though still remains in the T20. URM did play a role, but it wasn't all that overt. We still interviewed and reviewed plenty of URM applicants that didn't have superstar stats. One might argue that they were the recipient of benefits from their URM status at that point. I really don't know.
We weren't going out of our way to accept potentially problematic students just because they were URM. That being said, strong URM applicants would almost certainly get an acceptance + scholarship where a non-URM student may not have the same outcome.