Is it really just UI polish? Google+ makes you choose who you're posting to on every post. Does Facebook? Isn't that a pretty big difference; on Facebook it i

Is it really just UI polish? Google+ makes you choose who you're posting to on every post. Does Facebook? Isn't that a pretty big difference; on Facebook it is an optional entity that you must seek out and on Google+ it is a feature built into the posting architecture. You cannot post to Google+ without choosing a circle (even Public is presented as being a circle, reiterating the importance of the concept).