I have slim long fingers and dainty looking hands(from the top anyway, from the bottom they look like the hands of a worker). I can close a number 3 CoC, crush apples, crush beer/soda cans, crush potatoes, close a Vice Gripper(tougher than CoC's, at the hardest is equal or tougher than a #4) at over 260lbs. If I can do all of these things now, what will I be able to do 3 years from now if I keep training hard?
Quit complaining about genetics and train harder.
Oh and btw, I was at a power lifting show a couple weeks back and I brought a hand dynomometer, out of all the guys with giant hands who were very strong power lifters. Only one guy could out pull me on a dynomometer, and he told me he could just about close a #4 CoC... he was also probably about 90lbs heavier than me. His dynomometer pull was truely world class.