Circles seems like the sort of feature that would appeal to power users (and indeed I remember a bunch of academic type people using Google+?) But most users a

Circles seems like the sort of feature that would appeal to power users (and indeed I remember a bunch of academic type people using Google+?) But most users are not power users and don't want to do a bunch of thinking about what circle each contact belongs to. Nevertheless it seems to me like the network effect was the main thing, and Reader could've been a huge step there.