Jade Wang from Google announced in a Google Business Help thread that they are dropping the reviews that are listed in Google Local results as from "A Zagat User."
To show a consistent reviews experience to our users, reviews that are labeled by “A Zagat User” are being removed from Google products. Reviews from Google users will still appear as usual, and users can still contribute reviews. This may affect the overall rating for some businesses.
Here is what the reviews from Zagat users look like now:
That seems like it will be going away very soon.
Forum discussion at Google Business Help.