Google AdWords New Ad Format Labeled "Ad"

Spotted by two of our readers, @adaircameron and @tecnonetblog, Google is showing a new ad format test for mobile AdWords ads.

This one is interesting because it shows the ad as a normal search results listing, i.e. no change in background color or format. But to differentiate the ad from the organic results, Google places a gold background rectangle with the word "Ad" in it.

Here is a picture from tecnonetblog:

I am not sure if this will be going live to all mobile Google searchers or if this is just an early test.

Forum discussion on Twitter.