ShoeMoney is a great guy and a smart one also, he recently wrote a blog entry named Is your website making what it should be? In that entry, he explains the rational he used to come up with a new conversion metric term he named "IPU". IPU stands for Income Per Unique and ShoeMoney explains it as follows;
So for instance if you have a site that is bringing in 8,000.00 a day and you are getting 65,000.00 uniqes a day that is around 8 cents per uniq user. That is pretty good. I have sites that range 2-9cents per uniq depending on the niche.
Now, a thread at DigitalPoint forums asks you What's your IPU? with a poll. This is in the AdSense forum, so it is specifically asking for it in AdSense terms. If you take a look at the results (at this time I see 13 responses, the majority have an IPU of 10 cents or less, most only 2 cents or less.
Forum discussion at DigitalPoint Forums.