If you've passed a car before, it feels pretty clear that minimizing your time spent in the same lane as oncoming traffic is a much bigger priority than minimizing how much you go over the speed limit.
I've passed plenty of cars. Usually, in this scenario, I can exceed their speed by 15+ without even crossing the speed limit. If I had to go 10+ over the overall speed limit to pass them, I almost certainly just setup a situation where I'm either speeding in general to stay ahead of them, or I moved a single car's distance in the line that I was in. Which... seems silly to argue for.