Circles is very interesting, its could solve a work/life/parents social battle I fight, however the demo only allows you to add a person to one circle, I hope this is just a demo limitation, as my sister is also my 'friend'.
> I'm afraid it might not be
What leads you to that conclusion? Any article I've seen hints at the opposite.I'd be shocked if, as you note, they intentionally cripple one of the core components of this site.
> It is a demo, after all.
It's a goal driven demo that seemingly exists solely to show off the animations.I would agree that a more free-form demo would be interesting, and could be less confusing, but it wouldn't fit as well with the rest of the tour page, IMO.