No, long legs/limbs is most common among Africans and people of African descent regardless of height. The reason is because in a hot climate humans adapted by having long limbs which allows for wider surface area to dissipate heat to prevent heat exhaustion, you see it in wide ears and nostrils, big lips all to increase surface area to dissipate heat.
Tall people are naturally more uncoordinated because everything is further away from their strongest joints. Shorter limbs and people have better center of gravity, and can maneuver far easier, smoother than a taller individual, the athleticism will add to their abilities. This is pretty much the nature of The Square/Cube Law. Taller people need to deliver more power to overcome their weight. As you get taller and bigger, your absolute strength will go up but most importantly your relative strength will go down as does your cardio/respiratory functions. Relative power or strength is what athletes in power/speed sports desire, this has a genetic ceiling based on your CNS which is given to you at birth you can't train for it. What training does is actualize or REALIZE your latent talents per say your body will respond to this, but their will be a limit of diminishing returns. All else being equal your CNS will be your greatest limiter.
Cadence should not even be practiced or worried about. Just technique should be focused.
