"IQ" measures an inferior form of intelligence, stripped of 2nd order effects, meant to select paper shufflers, obedient IYIs.
1- When someone asks you a question in REAL LIFE, you focus first on "WHY is he asking me that?", which slows down. (Fat Tony vs Dr John)
2- It takes a certain type of person to waste intelligent concentration on classroom/academic problems. These are lifeless bureaucrats who can muster sterile motivation.
Some people can only focus on problems that are REAL, not fictional textbook ones.
No it's not! I side (in part) with @nntaleb and others such a Richard NIsbett (Intelligence and How to Get it) and Stephen Ceci (On Intelligence, More or Less).
David Sloan Wilson