Adsense: Text vs. Image Ads

Adsense text ads tend to blend into your website more, which results in a lower CTR; whereas, image ads stick out more against the content of your website, which results in a higher CTR.  This does not necessarily mean that image ads are better than text ads.  Generally, Adsense image ads are CPM ads; this means it might be a good idea to use these ads on webpages which are unlikely to get clicks.  Depending on your website it may be beneficial for you to use Adsense text or image ads.  In my experience with another blog of mine, I decided to switch from Adsense text ads to Adsense image ads; the results were surprising.  I received ~25% more clicks while using the image ads, but the image ads paid ~50% less than the text ads did.  Maybe this is because there is not as much competition for image ads in the niche, which would explain the lower amount paid per ad.  The choice to use Adsense text or image ads really depends on your website.  You should also consider individual ad positioning to see if certain placements are beneficial to image ads, while others are better for text ads and vice versa.  You will not know whether text or image ads will actually perform better until you do a comparison between them.