I find the "communities" better on Google+, but all my friends post there normal stuff on facebook. I find the technical forums (the few that I am a member of) are asking a newbie question (nothing really interesting) like how do I print a number..... when it is facebook, but much more interesting communitie tech posts on google+.
Agreed. I'm on G+ daily, post occassionally (both public and privately), and almost never go on Facebook. G+ just developed better communities and people tend to use the communities instead of blasting everything out to everyone; perhaps because G+ has a higher technical userbase than others, but nonetheless it works well.
Though, thinking about it more, G+ by design is community oriented. Blasting out to the everyone doesn't really stuff very far; while sending it to one or more communities does - that is, unless you're a big celeb and have lots and lots of followers, but that's just not typical in G+.