as a 3rd world developer now living comfortably on the 1st world this is exactly my experience, people in the developing world are in general more ignorant on technology, so even if you are an excellent developer it is still going to be a hard sell to ask for a US dev rate. The emerging economies are not technology driven in most cases. In my case I had to look for work outside my own country first to more reputable South American countries and eventually in North America.