So far it doesn't seem to matter who jumps from which height. As soon as some minimum height is reached (even a single story building) you are prone and take damage.
Shouldn't there be some form of athletics skill check so some people can fall savely from greater heights than others ? Or have I always failed the skill checks and it isn't shown in the log ?

I am asking this because I can't imangine that it is intended that the athletics noob wizard can fall as far without taking damage as my mobile dex fighter. He should at least resist the prone effect with a greater chance.