Martial Arts anyone?

[Tal]

I have a son that studies Tae Kwan Do.  He is not yet as tall as he will be but he does have longer limbs than most of his fellow (Korean background) students.

Speed and accuracy are what the training is for.  I have not noted any differentials in either between those who are short and those who are tall.

This has been my experience as well. I have a black belt in Tae Kwan Do and noticed no difference between students with longer limbs and those with shorter. Where I did notice the difference is with students of equal speed. In that case the student with the longer limbs did appear to have a slight advantage over the smaller limbed student. That is, of course, until the smaller student got inside the range of those legs. ;)