Did Stanford test years ago before all my partying and drunken weekends while in the navy. It was a scale from idiot-150. 70-89 was your ex girlfriend, 90-100 was normal, 101-115 was normal beta student. 116-130 was exceptional and 131 to 139 was very exceptional. 140-150 was rocket scientist. They warned that closer to 150 you got there was possibility of going crazy/mad. I got 138 at the time and best friend got 139. We felt it was accurate cuz we looked at everyone else all the time as if they were stupid. Which makes sense because I look to Nickola Tesla as a intellectual icon. I also set in college with a 4.0 GPA and often asked questions the professors couldn't answer. Sadly they often asked questions to me that I could and often in elaborate detail to the point I had to stop and make sure I wasnt teaching the classes.
I'm kind of the opposite when it came to grades. I had B-s and C+s throughout my high school and college years. Why?
3 reasons:
1. I felt like the kids around me were stupid and really slow
2. I felt like teachers took too long explaining to slower kids so I always got bored waiting and lost interest in the topic
3. I was learning way more advanced/interesting stuff on my own on the internet. Ex. I built my first computer when I was 12 and was learning about how CPU circuitry worked rather than studying for my whatever I was studying at 12 at school.