Searchblog Readers on AdWords & AdSense
"I have wondered for a long time why Google doesn't provide more transparency with its click data. Your content click reporting issue occurs with site targeting as well. Not sure if they are consciously hiding the information from advertisers or just don't have the tech to push this data out."
The person who wrote that comment did put a winking emoticon after that last line. Of course Google "has the tech" to push out that data; they apparently don't want to.