Google+ vs Facebook

There's lot talk about mobile devices and apps but here lets discuss about G+ . Since many days G+ is here and google trying its best to attract users to G+ , but still i don't find any of my friends using it. I never see any posts/updates from my friends but there's lot more things ill come to know related to Android and Google there. Personally i feel G+ is lot better than FB only thing is i don't know why others still stick with FB. If half of my friends comes to G+ then ill not use FB regularly.

Why do you think G+ is still lagging ?