Many of us are verbal, so no, writing well isn't unusual.
I'm a good writer; statement of fact, as arrogant as it sounds. I joined AP English 11 during sophomore year (and our AP English is significantly harder than most; more fact) and was one of five students to receive at least an A past first quarter (which, despite coming in a full month late, I also got an A in); I achieved straight As throughout the year, no work. 5 on the AP exam, easy.
Creatively, I was first published at 11, then published again at 12, 13, and 14, both in the UK and the US. I've been more or less turning down offers to do more since then. Placed in a state competition (as an alternate) at 14; over 1,000 kids worked up to be in that competition, and 350 were competing that day. Received an offer from a publisher for one of my works in progress (I turned it down). First student in half a decade to get A+s throughout creative writing, which is also harder at our school than at most (we're one of the most difficult schools in the state; fact again).
I write when I wish to write; at the moment, I'm mainly toying around with some competitions.
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"Nothing worth having is easy."
Three years!