Yes, the size of the calves at the pre-training stage has to do with body type, and the progression of increasing in size as well. There's no perfect body type, each has its pros and cons, it's just that ectomorph people are born leaner and grow muscle much harder and will continued biologically until s/he dies. That's why ectomorph people don't become musclar bulk around and have hard time gaining mass, because of their high matabolism. While on the other hand, mesomorph and endomorph people you see them usually have big arms and legs genetically, because they grew muscle very fast, but with problem of having too fat content in their body. Which is why endurance training/ cadiovascular training is the best for them. I will say this important fact, muscle size do not determine strenght, it determine potential that mass gives to gain strenght. A perfect example would be bodybuilder, who has heavy muscular mass, but they're too weak for the muscles in their body. And yes, tendons/ligaments have it shares of work of determining body type, the bigger they are the more mesomorphic and endomorphic.
Each of us are born ecto, meso, or endo has to deal with our weakness, we can not change our genetics, but we can change how we look physically, whether to look more meso or ecto, or possibly endo. Even if we change ourselves physically. We can't change who we're inside(ecto,meso, or endo). In fact a lot of professional atlethes now a day are ectomorph. A perfect example would be Pele, Djibril Cisse, Ronaldinho, Cristiano Ronaldo, Henry, Iniesta, Ze Roberto also many of world class sprinters. For mesomorph(lucky ones) examples would Maradona, Adriano, Kaka, Lampard, Messi, Michal Richards, Ballack, ect. I don't see shame being any of the body type, we just need to work on our body and take care of it.