Freaking idiots. I'm guessing the author based that statement on this kind of much more reasonable article:

http://www.theatlantic.com/education/archive/2013/10/the-myth-of-im-bad-at-math/280914/

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Is math ability genetic? Sure, to some degree.

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For high-school math, inborn talent is much less important than hard work, preparation, and self-confidence.

Let's go from there to "There is no such thing as a math gift," though, because that's fun!