Today at the Google I/O conference the Director of Google Maps Daniel Brath announced that the Google Maps ratings are going back to a 5 star scale. Restaurants will still have the 3 component Zagat score but he did not mention if this would be retained for other locations.
Also mentioned during his presentation is how Google Offers are now directly integrated into the mobile app/browsing experience. As you can see from the screen shot below the offer along with an image is prominently featured just below the company’s contact info.
You can watch the Google I/O 2013 Keynote presentation on YouTube. Daniel’s discussion regarding the review scale starts around the two hour and thirty minute mark.