Minor change to social buttons on Google+ for Android

If you're a frequent user of Google+ on your Android device, you may (or not) have noticed something a little different about the 'Share' and 'Comment' buttons.

Some users are reporting a visual change to the social buttons on the Google+ app for Android. For those lucky/unlucky few, the normal icon buttons for 'Share' and 'Comment' have been swapped for text.
Old
New
While it isn't immediately obvious why the phenomenon is reaching only a small group of users or if we'll see a wider rollout, it would be interesting to know the reasoning behind the update. We may just have to add it to one of life's greatest mysteries or dismiss it as A/B testing.

We're currently conducting a poll on our Google+ Page so feel free to put in your vote and let us know what you think of the text buttons.