I still know who wrote:
And the distance where height is the biggest advantage is the 400m, not the 100m.
I do agree that height is a big advantage in the 400m as well, but I think time will show that it helps just as much in the shorter sprints. Like I was trying to argue in part of my post, most tall athletes are not pushed in the direction of short sprints.
van Niekerk, who happens to hold the 400WR, is 6'0". Michael Johnson is 6'1" and held the 200WR for several years. For what it's worth, Bekele is 5'5".