400m is about endurance...40yds/100m is about explosion and top end speed....the ability to maintain a 90% sprint for 400m says nothing about ones explosiveness
As I suspected he either did not run the 400 or that time was wrong. He looks fast on film. But for all you track experts one question. Do you really believe if Mr Bolt from Jamaica trained and ran the 400 that he would not run a good time? Do you really believe if Michael Johnson ran the 100 he would not run a good time. The reason is because fast is fast. Some events are more suited for others that is why the same guy does not win all those events. Looking at this guys long stride I bet the board that time is wrong and he would run 54 in warmups.