IQ/productivity across PhD/MS/BS, academia/industry, tech/research-tech

Below are my biased but honest observations on people's intellectual level and productivity. I have gone through ivy league lab, good state U lab, industry r&d, small tech and FAANG. Ivy league PhD: absolutely the highest density of prodigies, but a divergent group socially/behaviorally. They are full of themselves to say at least, but damn, they are geniuses. Half of them become wall street a-holes. State U lab: much more normal behaviorally. Very focused and well trained scientists, deliver solid work, but not as bright as the ivy kids, by a obvious margin. Industry research lab: mostly PhD. Similar vibe as state U lab in terms of intellectual capacity except that the goals are much well defined and innovations are very directed. Still fun to talk with. Small tech: mostly Bachelors. People are "normal" that they talk about football, TV shows, the stock market, tabloid news etc instead of the latest matrix inversion algo or exactly where Interstellar was wrong. But there are quite some seriously dumb people that did not pick up concepts in time or follow instructions that are remotely complicated. Nice people, but boring. Amazon: mostly MS, many MBA if they are too rich/busy/stupid for a real post-grad degree. People hate each other and do not really chat unless absolutely required. There is no lame person, however a lot are as dumb at being useful except they talk fluent politics and are good at stacking meaningless business terms. ChatGPT is more coherent than these folks. I guess in some sense they are useful to support Amazon as an empire.