Genetics can only get you so far. You have to work your calves hard if you want results. Mike Matarazzo is a prime example. He was genetically gifted and worked his ass off for calves. Arnold is the opposite. He used to wear cut off sweats because he hated his calves so much and so everyone saw how bad they were. He used that as motivation to create some of the best calves ever.
So yes, there are people with genetically big calves, and some may be well developed without much hard work, but you're not going to step on stage and beat anyone with a good physique just relying on genetics.
And I'm going to say this because it is true and it's not a racist comment or politicaly incorrect, in fact it's one of the things talked about very often in competitve bodybuilding. Genetically, african americans are usually handicapped by their calf development. I think it has to do with a very high insertion point of the gastroc's. But since 2 of the past 4 Mr O's have been african american (and won a total of 16 times between them), genetics can obviously be overcome.
And for those of you that are bragging about your genetics, why not work even harder??? That's how you get a truly freaky physique. You dont just half-ass it and say "my genetics will take care of it". I mean you can if you're a loser i guess...