I have an easier time getting a 2-year-old to share than an iPhone. While Android has a universal sharing menu that lets you send content to any share-capable service, iOS treats every app as an island unto itself. For example, the Safari Web browser can share with Facebook, Twitter, email and SMS messaging, and the iPhoto app lets you share with Flickr and iTunes as well.
Since neither of these preloaded apps have heard of Google+ or Pinterest, you can't share to them. However, on Android, I can share from any content app to the most obscure social network or messaging service (ICQ, anyone?), as long as I have it installed. Unless Apple makes a major change to its operating system, which is unlikely, the iPhone 6 will suffer from the same, lame sharing problem.