I wouldn't say he has incredible genetics. I personally think he has above average, he was training at 13 for fucks sake, that plus copious amounts of performance enhancing drugs would work wonders for most.
I am not in any way saying he doesn't have an awesome figure, i personally love his look, just saying that it cannot all come down to genetics. He has been training now for almost 11 or more years, i would guess that maybe 6-7 of them have been hardcore and that 3 of them have been using drugs.