I perhaps should have phrased that comment a bit more clearly. I meant that if you only
used G+ like Facebook, then you would be wasting its potential. I personally think that G+ makes it much easier to communicate with people I know. The only thing that G+ is lacking, of course, is users. It doesn't matter how great the features are if your friends aren't here.
But if people keep thinking that G+ is just Google's version of Facebook, then people will never switch from FB to G+ precisely because everyone they know is on FB. People need a reason to use G+ that isn't affected by the lack of people they know using the service. And G+ has that, in that it allows people to connect more easily with others who share their interests, and that it integrates all of Google's other services.
People need to acknowledge and embrace that G+ offers something that FB doesn't. Only once more people are using G+ for these other reasons can it become a viable alternative to FB in terms of social networking with friends.