I was a sprinter and hurdler in college. I attended on scholarship but no where near as fast as Bolt. I do recall I would often be the only White guy in a sprint or hurdles race.
Tracks really make a difference. We had an asphalt track and that is mostly what we ran on. I remember one year at the Florida relays they had a new track which was very spongy. It was so different that it messed up my steps between hurdles. I was able to maintain 3 steps but had to chop my steps just a bit.
On an asphalt or even dirt track, my steps came just naturally. That is why most hurdlers are around 6’1” or 6’2” and have a 31 or 32 inch inseam.
Of course, you're referring to 110M high-hurdlers. I stood next to Edwin Moses once at Disneyland. He was maybe 6'2" or so, but his inseam must have been 37-38". All legs. God just made him to be an intermediate-hurdler. Most extreme example of that I've ever seen personally.