I absolutely feel it has alot to do with a well 'trained' owner. But that's in reading/learning knowing your chosen breed PLUS how to work with and train it.
That said, to me, 'trained' isn't a perfect fast 'down' or 'sit' but much more a dog that is socialized and acclimated to be calm and comfortable no matter the situation they find themselves in. A dog that can be taken out in public safely as well as to any huge family reunion and has good house manners.
Because a dog like that can learn anything, anywhere.