Google are desperate to get the average Joe on to Google+ but it seems to be inhabited soley by geeks and marketers looking for an SEO edge.
I asked loads of customers whether they were on it and pterry much everyone said something like 'I have a gmail address?'
Then I said are you on FB? About 90% said yes and use it daily.
Google can skew the seo factor to persuade people like us to use it, but until you get Mr and Mrs Jones on board its a social wasteland.