When I search for a landscape-related keyword, it usually includes something from Headz being in my first page of Google results. Same goes for one of the mowing guys on here. There are definitely advantages to Google+, if you look at it as a retargeting ad vehicle of sorts.
(Retargeted ads are those ads you see from place to place, that tie back to a product you previously looked at. Say you check out a stereo on Amazon and, as you move along to other sites, you miraculously start noticing Amazon ads for that stereo. That's retargeting.)