I bet that in the early days of Facebook & Twitter, they were not releasing their number of active users either.
I remember when I signed up for Facebook in 2007. None of my friends were there. They were still on Friendster.
History should teach us a lesson that growing a social network takes time.
it's not comparable.
that being said I think their rate of growth is very good. i also like the G+ UI a lot more, it's pretty good.
The only thing I dislike is that it's one more thing that Google fully control and doesn't really open up.
Note that I actually dislike both for privacy reasons as well.
I bet that in the early days of Facebook & Twitter, they were not releasing their number of active users either.
I remember when I signed up for Facebook in 2007. None of my friends were there. They were still on Friendster.
History should teach us a lesson that growing a social network takes time.