I also check it, I think webmaster still have to install another script from Google to see data from their Google Plus metrics.
So you have got a very small boost. ok, tell us what did actually happen when you get +1 to your site.
I had a quick look on my webmaster acc earlier, couldn't see it, might just be blind so i'll check again lol
barry put up a screen here: http://searchengineland.com/google-1-reporting-now-in-google-webmaster-tools-83798
Just got G+1 to our website. I've never show this from our report, geographic and demographic information about the Google users who’ve +1’d the page. I looking forward Google +1 social networking site.
Yes, its there in google webmaster tools... but it will take effect when someone gives the +1 to the site in rankings.. though it is considerable to get good rankings.!
Yea this new feature is great. It will provides you all your Google + likes and shares under web master tool. Google is evolving the way social works