Ive been using google plus a lot more recently.
I think facebook has become overburdened with marketeering.
one thing that I did notice however was that I was being bombarded with notifications (like Facebook does by default too)
if someone replied to a comment that I made then id get a push notification to my ipad, another to my iphone, and an email – which beeps on all my devices (thats 5 notifications for one event!)
there is a way to turn it all off though:
in google plus, go to settings
then untick everything under the notifications [and also turn the push notifications off!]
maximising your iphone battety
syncing your iphone / ipod touch with google / gmail / google calendar / google contacts
syncing your iphone ipod touch or ipad with google gmail calendar and contacts