We have no idea how brain works, so we can only make hypotheses based on experience. When someone can "see" an answer without being able to explain how he came up with that answer, regardless of how useful that skill is in the real world, that is something. Maybe sometimes all his neurons connect instantly in certain circumstances. Who knows.
Another reason I think this is possible is because sometimes I come off that way (to much lesser degree) to other people. Sometimes when I come up with a solution to a problem (not at all domain specific), people wonder how I can do that. I can't explain of course. I am not trying to say I'm a genius. I'm saying things like this happen sometimes for no reason. And "highly intelligent" people tend to have more of these than "normal" people.
Anyway, these are all just theories, yours included. So I think just saying that our brains objectively work in certain ways is not a good idea, and is probably wrong.
There's also considerable evidence, IIRC, that, while the upper limit a person can reach in intelligence is genetic, that environmental factors play significant roles in both how closely that limit will ever be approached and how well/long what is achieved will be maintained.
> 'Smart' people will consistently go straight to: A -> C
Cutting out intermediate steps in a chain of analysis is more typical of people with applicable, domain-specific expertise than general smarts. Being smart isn't the same as being an expert.
General smarts is reflected more in a reduction in the average number of dead-end side paths pursued before making the connection from A -> B and again before making the one from B -> C.