An interesting WebmasterWorld thread has a lot of speculation around UK AdSense publishers earning more money with Google solely based on the fact of their location. Let me share publisher’s comments about this.

Then another new UK publisher came in and said:

The cause cannot be related to the exchange rate, so people are speculating that there is a publisher location factor in Google AdSense’s Smart Pricing technique. It can be just a coincidence, but what do you think?

Forum discussion at WebmasterWorld.