I don't care much for the term, 'real sailor' but I know what you're getting at, Will.
I like to watch sailors under sail, and I think I can spot what I like to refer to as a 
natural sailor.
I see it in kids and old people, and not necessarily with a lot of sailing experience.
In fact I know some sailors that have tons of sailing experience and technical knowhow, that I wouldn't call 
natural sailors. They would be 'real sailors', for sure; many are far more experienced than I.
I don't think you're born a 'natural sailor', yet I suspect there is something to what you start with in life, no matter what it is you're doing.
I can't explain exactly what 
it is, or how someone becomes a natural sailor. Still,  I think after years as a sailing voyeur, I know 
them when I see 
it.
Here's an anonymous(to me) natural sailor; do you see it?
View attachment 171816
Oh and 
real sailboats, that's another thread all together. 
