You were not born with certain skills, you had to learn them. They became easier with practice, and eventually, those not witnessed to your struggle, told you that you make the skill look easy.
Is it possible that some people are born with a set of skills that it would take years for others to master? It happens, a better question is why does it happen?
If you are Manuel Gonzalez, state police officer, then you would have one of these conceivable differences, though you would be unaware. It would seem that cars are alive to you, and when you sit with them, they give you knowledge of themselves with no words. You feel a jolt through your spine when you start a car, like it awakens from sleep and forms a direct link with your mind. You appear to control a car just like anyone else, hands on the wheel, foot on the petal, but your connection is unfathomable to anyone aware of the reality. If you are Manuel, people will understand that you can push a car to impossible limits and make death defying turns because it makes sense, you have been driving for most of your life now and it is a passion for you. It’s understandable that you may have practiced like a stunt driver somewhere without anyone knowing. That is the conceivable part.
If you are Dr. Frederick Cousins, former doctor of Neuroscience at the Mayo Clinic and assistant to Dr. Thomas Eakran of the Institute for Brain Function and current prisoner of the very same doctor in the very same Institute, then you are unaware of your ability, but aware of the difference that others call attention to when you remember something obscure. You could have a photographic memory if that is a real thing, but it is more synesthesia, the triggering of memories through your senses, that allows you to recall things that others forget. Your memory helped you through med school and you were able to accomplish a lot of things at a relatively young age, all because you can remember information and recall it at a rate that is unprecedented. Those skills came in handy as you worked at the Mayo Clinic and those skills combined with your collaboration with Dr. Donna Moss is the reason Dr. Eakran took notice in the first place. You are smarter than the average man, that is apparent and easy to accept.
Where do these difference come from? Maybe they are the result of overstimulation. As Manuel, you have found yourself in a number of high speed chases, under real stress to avoid death and unnecessary casualty. That could account for you. As Frederick, maybe your brain processes information differently to allows for faster retrieval.
There is something more to this of course, you know that. But these differences are human. They are only extraordinary because they aren’t common. They prove a certain spectacular potential in humanity that is still realized to this day.