Google testing new "Ads By Google" format

While updating some web pages tonight, I noticed that Google seem to be testing some new AdSense formats for their "Ads by Google" by-line so I took a screenshot (see the example on the right). Lucky I did because I haven't see the new format again since I grabbed it.

It appears they are testing an image integrating the Google logo to replace the plain text previously used. I knew they were rolling out new Google Checkout badges for AdSense, but I've never seen the new "Ads by Google" format before. Have I just missed them until now?

Anyone else seeing it? Is this a new thing?

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