Wrong. In Facebook most 'groups' are formed only from the people you know. The 750 million people has zero relationship to how many groups I'll be involved in, so there's a strong upper limit to potential group formation that is nowhere near what Reed's law predicts.
I've largely filled up my FB friends and rarely add new members anymore. I'm pretty sure that I'll be adding links (and being added) indefinitely with G+. On G+ I've already had more interesting discussions with people who relate to me in different ways from my real-life friends. These are spontaneous 'groups' that have formed briefly around a post, and from which links have been made that would normally not have been made. I wouldn't friend someone on Facebook just because they said something interesting, but on G+ I might follow them much more easily. There's less of a big deal with having to be 'friends' - you can just subscribe to their posts and might end up in many more discussions with them in future.
Think about HN. It's created friendships and careers and companies. If we were all doing this only via our Facebook friends, how much of this would have happened?
G+ has more people you'd interact with, more posts to interact with them, more dimensions to add links by. Not just friends, but interest groups, industry leaders, etc etc.
I've largely filled up my FB friends and rarely add new members anymore. I'm pretty sure that I'll be adding links (and being added) indefinitely with G+. On G+ I've already had more interesting discussions with people who relate to me in different ways from my real-life friends. These are spontaneous 'groups' that have formed briefly around a post, and from which links have been made that would normally not have been made. I wouldn't friend someone on Facebook just because they said something interesting, but on G+ I might follow them much more easily. There's less of a big deal with having to be 'friends' - you can just subscribe to their posts and might end up in many more discussions with them in future.
Think about HN. It's created friendships and careers and companies. If we were all doing this only via our Facebook friends, how much of this would have happened?
G+ has more people you'd interact with, more posts to interact with them, more dimensions to add links by. Not just friends, but interest groups, industry leaders, etc etc.