The reality of the situation sure seems to be the opposite. The only people I know that use Google+ regularly are people who work at Google (and Robert Scoble).
Yeah, that seems about right.
And comScore's report that the average Google+ user spends on the site about, wait for it... 3 minutes seems quite on target too. I personally have spent on Google+ something like 3 minutes in the last 3 months, but I'm a hater so the normal people might have spent a lot more. Like 3 times more.