His point on grit really hits home for me.
As a kid, I was always in the 99th percentile of any standardized test. People complimented me on being smart, but smart isn't something you can control, so I learned tricks to maximize how smart I appeared. That included jumping in to anything that came naturally to me and avoiding anything else. I basically never learned to work at anything, to endure frustration, to sit with failure and get past it.
People meant well, I agree with the author: the common notion of genius as something innate and magical is toxic. By all means, make sure kids are properly challenged. But we should do it for every kid.