There are plenty of college-educated people who seem to believe it and even books that claim it's true. As for how high whites and blacks jump, while it's true that certain races (actually, ethnicities) dominate sports with certain types of physical activity, the differences between races is relatively minor when compared to the differences between men and women when it comes to strength. That's why you'll see a mixed-race field of athletes qualified for almost any sport in the Olympics and they'll perform at least competatively while you won't see mixed-sex sports. If you did, this whole left-wing mythology would collapse like the house of cards it is.
"As for how high whites and blacks jump, while it's true that certain races (actually, ethnicities) dominate sports with certain types of physical activity, the differences between races is relatively minor when compared to the differences between men and women when it comes to strength."
Very true. Thats why all this get women into new military roles stuff bothers me. Sending weaker, slower soldiers into the field puts everyone else at risk.