Duncan Riley at the Blog Herald has been analyzing the performance of the advertising on his Weblog Empire network, and has posted his conclusions about optimizing ad performance on blogs. Some of his findings are pretty well established (i.e. tight niches perform better on AdSense) but there were also some surprises. Duncan writes:
It really, really surprised me how many days I?d look at the stats and see clickthrus from Adsense ads on pages here at the Blog Herald that are so old I don?t even remember writing them! And sometimes the CTR is higher on these pages as well. Perhaps the Adsense ad was more relevant that the 2 year old content? who knows!I've seen this phenomenon as well with older posts on offbeat topics. I still get a steady stream of traffic from a series of posts on cryptozoology (one of my more oddball interests) on my Technosponge blog.
Check out Duncan's findings, and see how they compare with your experience.