WebmasterWorld's founder, Brett Tabke, noticed Google changed the design for the AdWords ad search feature and posted a thread about it at WebmasterWorld.
Now, Google lists out the ads in three columns and four rows, with a total of 12 ads per page. Here is a screen capture:
People do like the new look and layout, I do also. But there is confusion over how the rankings of the ads work. Do the highest ranking ads go left to right or top, down and then right? Some even say that the ads in this search do not rank in correlation to how they actually show up in the Google web search results. I suspect that is right, so the ad layout really doesn't matter in this case?
Forum discussion at WebmasterWorld.