– I have invited 5 people to the service (as per their requests). And yet I have 163 people in my circles. Right now the rate of people adding me to their circles is increasing.
– At least half the people I don’t even recognize at all. Most of these are obviously people who know me from the blogs I’m associated with in some capacity judging by people we have in common. A grand total of 1 person is someone I know from high school, and this individual I actually got to know much better at university. Otherwise, people I recognize and know tend to be bloggers and my friends in “real life” currently, topped off with a few friends from college. In contrast, Facebook is stacked with a lot of my friends and acquaintances from high school (as well as random people I met at conferences over the years or something).
– I still don’t know how to really use the service or see any strong components of functionality which gives it a comparative advantage over Facebook besides the relative transparency of circles vs. Facebook groups and lists.
Right now I’d say that Google+ does very little, but what it does it does smoothly. Facebook does a lot, but much of the implementation is kludgy. But for someone like me I think Google+’s future role may actually be to replace twitter, judging by how many people who I vaguely recognize only from twitter!