I agree with EWO.
I have specifically bred for head dogs ever since I had Poncho.
My line is known for head dogs as a result, so I am 100% sure that style is (and can be) genetic.
However, as EWO said, some dogs are stubborn and will never change ... some dogs are "that way" (style-wise, genetically) ... while other dogs are smart, adaptable, teachable, and therefore capable of learning and growing as they go.
It is hard to say what any dog is going to be, which is why
schooling is so important.
You can't know the teachability of any dog unless you school ... and school properly
I don't know Gr Ch Titere personally, but I would imagine by now he knows every trick in the book, and (the realities of age/wear notwithstanding) that has seen it all, and knows what to do in (and how to counter) virtually any situation.
I am sure he operated on "raw genetics" (or close to it) on his first deal, but by now is a totally-schooled pro in what he does.
Human fighters are the same way: it is hard to know any boxer's potential, until they've sparred on multiple occasions. Some will be "defensive" and not really want to get hit, some will be super-aggressive and not think about defense, while others will not want to box anymore after they get hurt. And then there will be those of deadly intent who
learn defense, so that they can better-execute their attack. These are the ones who will become stars.
Human fighters may begin a pro career with "raw talent" and have some "natural moves" ... but they are at their peak when they have a certain amount of
experience also.
And so it is with dogs. Both their natural aptitudes as well as their developed styles, gained through experience.
Some dogs are on the head because they're "afraid to get bit," while others are on the head because
they know that's how to control the fight, but it takes a dogman to recognize the difference. This is where schooling in THE OWNER also comes into play
Some owners can spot the difference right away ... some owners develop an eye through experience to be able to tell which-is-which ... while some idiots will never have a clue and never recognize the difference in what they see as they watch dogs
Therefore, a total natural vs. acquired talent through schooling vs. "no chance to improve" applies to dog
men, as owners, same as it applies to the dogs we're trying to evaluate.
All of the above can be true, it depends on the dog, and it also depends on the dogman.
There is no "one" answer for anything.
Jack