I personally always had the impression that the bulk of AdSense publishers are between the age of 18 and 30 years old. That is just my biased opinion of how I see Google AdSense publishers.
I guess I feel that way because typically small publishers put ads on blogs and other sites similar to blogs, like forums, simple content sites and so on. But is that the true average age of the typical AdSense publisher? Only Google knows. But there is an informal poll at WebmasterWorld, which makes the poll, itself, skewed. Why? Well, it is polling only members of WebmasterWorld and then adding only AdSense publishers. In any event, what are the responses?
40, 25, 60, 40, 50, 40, 62, 28, 71, 45, 47, 43, 30, 48, 38, 28, 33, 63, 44, 41, 42, 47, 46, 49, 26, 55, and 36. Those are the responses. Well, I can honestly say I am surprised by the responses. I suspect the same poll at DigitalPoint Forums would yield younger responses, but I can be wrong about that.
Let's do our own poll. Google AdSense publishers, how old are you?
Forum discussion at WebmasterWorld.