Final paragraph of a Google+ review
Google+'s appeal to the new-media crowd has been the secret to its early success. It is also quickly shaping its foundational culture. The problem for Google, assuming it wants to turn G+ into a mainstream social network rather than a niche one, is that this culture is both strong and narrow. It attracts a particular set of users, but it repels pretty much everyone else. G+'s prospects may, in other words, be circumscribed by the culture that its early success has already established.