I just update the iOS Google+ application on the iPhone 4s and I have to say that it is a true update. The application looks very polished lots of large pictures with rich text. The new user interface is more of an experience that iPhone users are accustomed. The does not look Facebookesque where is just looks like a stream with a white background and text. I have added some pictures below of the new interface for you decide wether you like the new interface or not update and stay with the old version.
Another question I have is this seems to make the application (depending on preference) much nicer that the Android version. I makes me wonder what Google has in store for the Android version and why it was not updated first.
(Android Version Pic 1 only) (iPhone Version)