Earlier this month, Google launched AdSense Experiments, an automated and seamless way to test variations in ads so that you can see what types of ads earn you more money.
I am honestly surprised to see very little feedback from the publisher community on how these are working.
The WebmasterWorld forum thread has some people who have tried it but have not learned much from it. But most have not bothered to even try it.
OK, so after few days of experimenting on two ad units my originals show better results. BUT, google still bets on variations. I wonder if they push their beloved "allow text and image ads for better performance" suggestion through the confidence score, because in both cases poorly performing variations are "text and images", while my originals are image only, and google still gives 90-something confidence score to variations.
Another publisher said:
I'm running a few experiments myself, and not mush to report yet. What I do find frustrating is 2 of my sites get a lot of traffic, yes ads for only one site can have experiments. Has G decided the other doesn't need it?
I found very little discussion in the Google AdSense Help forums except a technical problem setting it up.
Have you tried it?