Speed kills, and hand speed is one of the biggest components of speed in hand to hand combat. There is a lot of controversy over hand speed. Pepole often question if hand speed can be trained or not. The truth of the matter is that while hand speed can be trained, it can only be trained to a certain extent. With our genetics which determines our physical makeup, our body is given a potential and a limit based on our genetics.
This means that no matter how hard someone trains, there will be an individual with greater potential who is more gifted. This is the case of hand speed. The variances in hand speed is not caused by differences in training, but by differences in genetics.