Interesting thread--stumbled across it in a search for achievement tests. I've been uncomfortable with the growth mindset thing myself, but haven't been totally able to put my finger on why. (And yes, I did read the book.)
One thing that was a revelation to me, as a gifted girl in adult form, was to discover the concept of "impostor syndrome." It was so gratifying to be able to put a label on how I've felt my whole life, and has opened up some wonderful conversations with other grown-up gifted girls. It's a concept that is concept that's constantly in the back of my mind as I raise my two gifted girls, neither of whom are in middle school yet, though one is getting close!
