We started hearing about analytics feature coming to Google Plus few weeks ago. It was expected to launch in the near future but it never happen.
Google has however now hinted again that they are nearing the launch of this feature for brand pages to measure engagement and +1s on their posts.
…in the coming weeks we will be launching tools to give you access to as much data as possible about your Google+ page and +1 activity: who’s interacting with your page and how; your users’ demographics; and info about their social activities like +1′s, shares and comments — all to help you learn how social campaigns affect your bottom line.
Looks like this could be one of the major first feature launch in 2013.