When people say that to me, I look them in the eye and ask, "Do you have time to market your business online...other ways? Why not experiment with Google+ instead of LinkedIn today? Why not make it your business to figure this out...and THEN you can decide if it's worth your time or not."
And then, I go off and don't take my own advice. Sigh.
Here's a great chart to help you get started... and if you're a Google+ Diva, please share some insight with the rest of us. What are we missing? What should we do first? Is this worth our time...or not? Is the graphic here any help at all? What's up with the Circles thing and the hangouts? What are the rest of us missing?