It is nice that they break up mobile from the total and that they provide daily active users. That said, I didn't see anything on that page that actually define

It is nice that they break up mobile from the total and that they provide daily active users. That said, I didn't see anything on that page that actually defined what they mean by 'active', so I think my point still stands. Then again, it's known Facebook usage is, for the time being at least, significantly higher than G+, so I guess it doesn't really matter.