Same here (well, mostly - there are some minor differences ._. ) --
As a kid (and still today), my parents, family, and many of my friends too said that I was brilliant and a genius and therefore destined to do some very great things.
The only difference between you and me in this case is that my parents thought it would be best if I stayed behind from advancing through grade-school and beyond because they wanted me to have as normal of a childhood as they could, given my high-functioning autism kinda wrecked that up a bit (AKA my very considerable psycho-emotional tribulations that I still largely deal with on a daily basis).
My parents are both extremely intelligent people too, and they passed it on to me - but my having of high-functioning autism covers it up kinda good with a speech pattern that gives auctioneers strokes due to how fast and energetically intense I talk and yet again the psycho-emotional problems that come with said high-functioning autism.
I too also just learn fast - really fast, like read-it-once-and-I-fully-comprehend-it fast.
Nothing too special about that, however, since my parents don't often give me much recognition for what I do (they're probably just jaded by what I do at this point, since I do a lot of batsh!t-caliber crazy things to begin with), so I inadvertently developed one of those "complexes" where I constantly have to one-up myself daily just to get recognition that I'll likely never get and prove to myself and others that I am smart enough to handle life, with little success due to the inability to feel satisfaction in myself and what I do due to me somehow being unable to feel the dopamine rush from doing something. It haunts me daily, this inability to feel satisfaction and accomplishment, irrespective of what I do - I often joke that even if I win every Nobel prize, it would still be a boring and unfulfilling day for me.
Sorry if this accidentally turned into one of those miserable therapy sessions where I rant about my psycho-emotional torment, but yeah - I'm extremely smart, but I don't bring it up in much detail because it reminds me of a dark internal void.
Sorry if this got a little dark and made some viewers uncomfortable; I can delete this comment if you want, though --