Assuming you're not personal friends with pg, the "friend score" between you and pg should be low. This shouldn't be an "interest score," since presumably the goal is that Google+ users would establish strong 2-way relationships.
I'm slightly surprised there's no huddle interface in the browser (or I've been too dim to find it). I know it's aimed at the text message/BBM arena, but I'd like to not have to move to a different device if someone messages me.