I think the correlation between smarts and developer might be strong, with a few exceptions. The thing is, people stop learning after University and stick with

I think the correlation between smarts and developer might be strong, with a few exceptions. The thing is, people stop learning after University and stick with what they have known and learned. On top of that, most developers tend to be stubborn because people have been telling them that they're "Special", that they're "Smart" throughout their live (a decent University CS major usually would require the students to take a lot of Math, usually up to 3rd year Math and Stats, and Science courses. Students who excel in these subjects tend to be perceived as "Smart"). It's hard for anyone to be humble when they had been brainwashed.