Pretty much where I stand on this.
I was an A student throughout elementary and high school, and have had high grades throughout my BA. I don’t know if I ever approved of how I was being taught, I was still good at working the system in my own way. Good grades are a consequence of how I happen to work, but definitely not the primary goal.
Naturally my experience doesn’t speak for everyone. I suspect that this article doesn’t describe every C student, or every A and B student. I have the same problem with articles about generational differences. You can’t catch it all.