I don't know how all those old farts would go if it was changed to 11sec in lieu of 10sec runs (says with tongue firmly planted in cheek)

Seriously though, the beauty about speed sailing is that predominately it is done on flatter water and in fairly quick spurts (not counting Nm, Hr or distance), so apart from the occassional get off (which might take longer to recover from) older guys are at no real disadvantage. Technique, experience and the guts to go fast are not age dependent. In fact the older you are the bigger your balls get (this by extension that they get a lot closer to the ground and therefore must be getting heavier )