A DigitalPoint Forums thread reports that Google is once again testing a new AdSense format. Here is a screen capture taken from a DigitalPoint Forum ad.
You can see the bottom right corner that has the "Ads By Google" is styled differently than a normal ad.
This is not the first time Google has played with that area. Here is a rundown of how Google has tested the Ads by Google location in the past.
In March 2004 we had AdSense Ads With Graphics that looked like:



In September 2004 we had Ads by Goooooooooooogle come out, it changed from the normal "Ads by Google" and looked like this.

Several times we had Google experiment with holiday themes.
In December 2006 Google Trying Google Logo on AdSense Ads that looked like this.

and an other like this.

Anyone getting tired of these tests?
Forum discussion at DigitalPoint Forums.


Comments:
Icheb
03/15/2007 12:19 pm
"Anyone getting tired of these tests?" What kind of a stupid attitude is that? Do you think Google changes this all the time just to piss us off? They certainly wouldn't do something that decreases CPC or anything to that effect so this "getting tired" is just ridiculous. Whatever improves their ads improves your income.
Barry Schwartz
03/15/2007 12:22 pm
Wow, I hit a nerve. Next time, try to be polite with your comments, I'll leave it, because it only looks bad for you. There is nothing wrong with ending a post asking for some feedback. Personally, these tests don't bother me at all. I am asking if it bothers others. But you can get mad that I asked. If you would like me to remove your comment, please let me know and I will.
soxiam
03/15/2007 12:50 pm
Wasn't there some talk about how if you see "Ads by Goooooooooooogle" that means the the page hasn't been fully crawled and the ads weren't being targeted yet?
Barry Schwartz
03/15/2007 12:53 pm
soxiam, I don't think so.
Ramenos
03/15/2007 03:24 pm
As for me, they have time to spend in Google Cie...
Juddy
04/06/2007 09:16 am
What is the reason to change background colour & adsense format of google adsense?