Of course some talent exists. Definitely not to the extent people make it, though. And if it does, it's just one in a million. Well... a whole lot more than one million, but you get the point.
Also - after looking into more info on this lady, she has a significantly higher number of drawings and paintings than shown on the website you linked(obviously). As in thousands more. Which is understandable, got to pick the ones that make people go "wow!" and all.
Your Website link also seems to have not been updated in a couple years. She's very almost 20 by now.
Most people don't develop such a large sort of passion or dedication towards something until a much later age, which would be a big reason most "people who can draw" are 18+, as they develop their interest a few years before hand, and then gain some experience to the point they're able to actually decide they want to spend their life doing it.
Where as this girl was home schooled and has had absolute fuck loads of time to dedicate to art since she was just a child. And dedicate, she did! I mean, for reals. I can't think of many kids that would want to just draw and write for hours upon hours every single day. She has over a decade of hard-on experience, yo.
Honestly - all I see is a girl who had a high knack for something, developed a passion for it at a very early age, and then dedicated her life to honing it.
This is all a bit off-topic, by the way. I think the OP has gotten her answers already.
That does not change the fact that before hitting legal age she did better art than most artists on earth, art that good artists take some years to acchieve. Natural selection should blow us all away into the void, we do not deserve to breathe the same air than the true geniuses.
Only people with natural talent like Mozart can enjoy art. For the rest of people, it is just a miserable and frustrating process where pain is the only constant. Art is more painful than a chore, art is more like a via crucis, a weight to carry, a pain to endure.