It's not identical, but what about it makes it something that a tall person supposedly can't do?
Tall players appear to move "poorly" for the same reason Usain Bolt always seems to "start slow," and then run past everyone at 50m.
All athletic movement is predicated upon the activation of kinetic chains. And the longer (taller) the links in that chain are, the longer they take to activate.
This is a benefit in, say, a service motion. Because there are no pressing restrictions on the time a player can use to begin and unwind the movement, all the free power that comes from the longer chain is theirs to enjoy and employ. It's also a benefit in a forehand you can get to easily, because longer levers allow for a brutalizing of the ball that shorter ones simply can't, all else being equal.
Likewise, the 100m dash has proven to be just long enough that the additional horsepower gained through the long strides has enough time to overcome the quicker starts of the shorter racers.
In tennis? Not so. With the sidelines only 27 feet apart, the faster integration of the kinetic chain shorter players can harness (what we typically call "quickness"), gives the vertically challenged a massive advantage in movement. Remember that even for the world's fastest man, it routinely takes him 50m to overcome the quickness of his rivals. They simply get their chains started and in motion a lot faster. And that's six times as far as you ever need to go on a tennis court. And tennis forces you to do that a dozen or more times a point, regularly. Taller athletes just physically can't do that at the speeds shorter guys can. The biomechanics are absolute.
Getting guys tall but "more athletic" can minimize the advantage somewhat, but never eradicate it. The best you can hope for is more powerful acceleration of the muscles from a tall, athletic player, versus a shorter, less athletic one. But a well-trained shorter guy will always, always, always have the advantage in acceleration. Taller players look quicker on NBA courts in part because they're more athletic, but in larger part because there's such an advantage to size in the NBA that the average player is about 6'7". Even the lanky look more athletic when being guarded by the lanky. Ask Michael Jordan how easy it was to stay in front of Allen Iverson, however.
Just about every sporting position that mandates frequent changes of direction, but doesn't directly reward height, is dominated by shorter athletes. NFL running backs and cover men, futbol/soccer players worldwide, etc.
In waiting on guys to show up with Delpo's height and Michael Chang's quickness, you're waiting on a unicorn.