Strange experiences, and I can see why you wouldn't much like science after that. I haven't spent any time at Ivy League institutions, but in computer science at other research universities, my experience is exactly the opposite, that most researchers come from non-academic families, and in many cases from immigrant families. I've run into lots of tenured professors who are either immigrants themselves, or born to working-class or middle-class immigrant parents, but I can't think of anyone I've met who has some kind of 3-generation Yale pedigree, like the kind you find among politicians.