No clue, but nor would I make a claim that I know. By most accounts racial disparity still exists, if not in the US, certainly in other countries. Taking a metric-centric approach as a starting point is probably an issue in and of itself, though.
"Objectively" sounds like good way to avoid talking about many things that were an issue at the time, with no real objective backing. Even the first sentence is a bit of an issue: "Jim Crow was over" is a bit misleading to say, even today.