I suspect Berkeley is on the high end of the spectrum as far as attrition goes. I went there for undergrad, and the pressure and difficulty was extreme in area

I suspect Berkeley is on the high end of the spectrum as far as attrition goes. I went there for undergrad, and the pressure and difficulty was extreme in areas like EECS. For perspective, after graduating I moved to the East Coast and worked in a research lab at MIT and took courses at Harvard, both of which felt quite laid back after Berkeley. It was the only school experience I had where I saw smart people work crazy hard and still receive C's and D's in some classes. The PhD candidate I lived with decided to take a year long internship with Intel (as a vacation) for mental health reasons.