Depends on how you use Facebook
I use a pseudonymous name on Facebook, and therefore get to choose exactly who I add to my network. No social pressure to add people from family/work because I happen to know them IRL. Before the new 'close friends', subscriptions and newsfeed filtering options were introduced, on average 20-30% of my newsfeed messages were relevant to my interests. Now it's more like 80%. Not bashing your choice to use G+ here - I, too, found the Facebook newsfeed signal-to-noise ratio a bit high before, but more & more options for streamlining one's use of the site are being rolled out. It really depends on how you (choose to) use it.