Earlier quoted context omitted.
"isn't that half a degree?" Probably not. Most "college credit" earned in US high schools is unfocused coursework that gets you out of (some of) your general-ed requirements. Lots of universities won't even transfer the stuff, and if they do, it's not typically treated as real college credit. Aside from that, thanks to the prevalence of AP courses it's much easier (and more common) for high school kids to get college…
Aha, quite different from Canada, then. Up here it's unusual for students to get any college credit while in high school, and when it happens it's typically no more than 10-15 credits of AP or IB credits.
A number of my friends did this though, so I don't think it's quite as big of an accomplishment in the US than elsewhere. Though I'll be the first to admit that my group of friends tended to be the high achievers in high school/university.
-- A undergraduate in CS/Mathematics