For what it's worth (and you all are getting to know that I have some pretty argumentative responses)... the odds of getting struck by a car when crossing the street increase with the volume of traffic.
Does that mean you should limit your foot travel or tell your children not to go anywhere during peak travel times?
I guess what I'm saying is that it's all theoretical and certainly for now at least, not backed by any tangible evidence
One of my current dive buddies (I don't solo with him for those of you who have read my response to solo diving) is a 14 year old that I taught at the age of 12... he's taller than his Mother... I think he might be 5' 11" right now and I'm being called his Father by most (I'm 6' 6"). Long bone problems he may have but they are certainly NOT lack of length issues... he's growing like a weed. I don't know what his Father looks like as he's one of those dead beats but he's either tall or this kid is having pituitary gland issues.
ScubaGirl... don't base your decision on age either. I don't know why any organization would specify an age for a limitation on whether or not someone should learn to dive but that seems to be the trend and I remember the big arguments over those restraint seats for children up to a certain age - ultimately the courts decided it needed to be revamped to specify height and weight - age is not an issue with learning to dive so much as the ability to comprehend the physiology of diving (bubbles, nitrogen loading, tables, math and safety concerns), the discipline required for the sport, and the physical strength that age has NOTHING to do with. I have seen kids that had to use 45's because they were just so small (but certainly old enough) and even the kid's BC's barely fit them.
10 is PADI's criteria but the call is up to the individual Instructor as to maturity or ability and PADI will not challenge that decision.