Pete Meyers posted on Twitter a new test Google is conducting in the local pack. Google is showing review snippets on some of the local results directly under the address of the snippet.
Here is a screen shot from Pete:
I personally cannot replicate it but it seems to come up when the Zagat or other 5th line elements do not show up.
I wonder how Google decided which of the dozens of reviews it should feature in this snippet area? The reviews shown here are not from any expert reviewers. It seems completely random...