Spot on. The US education system is fairly elitist. It supports the top 5% and neglects the lower scoring pupils. That way (and with imported brains), the US can maintain a high level at academia while at the same time affording a fairly bad average education level of the total population in comparison to some other industrialized countries. The university system is also very elitist through student fees, Ivy League schools, academic societies, etc.
That's why it's such a weird contrast for us egalitarian European schmucks when we get to know US colleagues in academia, who are extremely professional and well educated, while watching the daily news makes us think that the majority of US citizens must be mentally retarded and suffers from chronic lead poisoning.