Are you using the Newish 300x600 Adsense Ad? And if so what results are you seeing? Good, bad or indifferent?
The 300x600 Ad is amazing. I tried it 2 weeks ago and saw a 50% in CTR. Definitely try it out if you haven't.
It is bad now. because it is added newly the advertiser need to pick this up and publisher needs to add it to their site you can say because of low reach it is showing poor results.
Tried out and looks good so far. The CPC of 300x600 is definitely lower compared to a 300x250 ad, but the number of clicks skyrocketed with the new format. And the total income almost doubled. Good thing is the layout is relatively new and advertisers are only beginning to build up. Once the numbers become high enough, hopefully the CPC will also improve. Adsense seem to always serve the good ones to the big players though. Have a full comparison with a 300x250 ad including earnings here. skipser.com/508