for everyone that says g+ is a ghost town, you must not be finding people to follow. The entire point is circles. I'm on g+ everyday, and even has become my bookmark and evernote replacement, ill post to myself.
This is often the problem. Unless you are some kind of star in your own right, the odds are that almost nobody beyond random followers are going to include you in their circles. That basically leaves you with the option of circling others in order to have anything meaningful in your stream. Here again you are more or less guaranteed (in current conditions) that next to none of your friends/family is going to be on G+. So you are left with the option of circling strangers only, which is not what you would normally do on a social network.
The great thing about G+ is that in this large group of strangers there is a huge number of tech (and other) luminaries who are actively engaging on the network. Circle them and you basically get a stream of comments, thoughts, links and pictures that are really worth following. I've only circled about a 100 or so of these "strangers" and I've just loving the interaction. Sure, nobody (or very few) +1 anything I have to say, but that doesn't bother me as I'm far more interested in what they have to say. No way you can call it a ghost town when you engage in G+ this way.
On the other hand, if you circle nobody then it does become a ghost town. But it would hardly be fair to call it one.
I wonder if that's part of the point. On other social networks you're connecting with friends and family. On G+ you're circling strangers whose thoughts you're interested in. I think I'd prefer to mine the latter if my goal was to make better search results for you.
