Jim,
All I know is that when I was compiling the GOLF Magazine list years ago, the regional biases were not in evidence. Everyone said we did not have enough courses from Continental Europe, for example, but most of the American panelists tried to include a couple as tokens ... they just could not agree on which of them, apart from Morfontaine. But the European panelists, all of whom had played extensively in the USA and Britain, pretty much thought that none of their own courses belonged in the list.