You're welcome. Glad I could help.
My point, obviously, was that you have to compare like with like.
Yes, there are plenty of rich folks with crappy kids. Schools rankings aren't judging crappiness, though. They're judging (theoretically, at least) how well prepared the students are for college. There will always be kids from every social class who are unmotivated, do drugs, etc. But if you look at kids from wealthier families - whose parents tend to be more educated, have better nutrition, better prenatal care, hire better help if necessary, have higher expectations for their offspring, are more likely to delay childbearing until adulthood, are more likely to be fluent in English etc than poorer people - you will see kids who have a head-start from the moment of conception and a gap that widens through time. This isn't fair or nice, but it's not something that can be corrected by simply throwing money at schools in low-income districts, either.
We moved to NH from an extremely wealthy city in CA (not Beverly Hills). The schools are ranked in the top handful in the country. We were friends with a child psychologist who grew up in NH so we often talked about how child-rearing differed in both areas. He said that kids in our town seemed pretty miserable. He saw a lot of drug use, alcoholism, cutting, eating disorders, etc - mostly stemming from the almost impossibly high expectations of a culture that expects every kid to go to Stanford. His theory was that the kids in his middle-class town in NH were much less likely to have those issues, and much happier in general, but also less likely to go to a school like Stanford. And these parents, like most highly paid professionals, were working crazy hours.
Well, time to go help my own kid do some reading...