There are always exceptions to the rules but if you need some examples, look at Catherine D, Klem Loskot, John Dunne...the list can go on.
i don't see somone my size ever craking 5.14s, im 6'1 185-190lbs,
for example a little kid can get perfect hand jams in a 1/2 in crack but i can't till 1-2.5 in. hand size does make a difference and so does body size