HuskyPup - 6:20 pm on Dec 4, 2012 (gmt 0)
What you get paid per click is based on, in part, where your visitor is located
Yep, that's my experience too. For instance my average EPC on my main Indian site is 20% of US/UK however I do occasionally have 100% value clicks when non-Indians visit.
However trying to work out precisely who gets what from where is very difficult without using loads of channels and Google's metrics.