We've been reporting about the green AdWords ad label for months now and also reported yesterday about a huge increase in the number of searchers seeing the green ad label. So we, Search Engine Land got a confirmation from Google that this is officially rolling out and replacing the yellow ad label.
The old yellow ad label:
The new green ad label:
“We regularly test ways to improve the look and feel of our search results page. We’ve been experimenting with a green search ad label and have decided to roll it out based on positive feedback from users and advertisers. Our goal is to make our results page easy to use, and our labeling clear and prominent,” a Google spokesperson told Search Engine Land.
Forum discussion at Twitter.