I don't know any evidence one way or the other, either, but if, in general, white people have been more privileged, more powerful, and more wealthy, then it stands to reason that non-white people have been more abused, less privileged, less wealthy, etc. So, IRL, who would likely be the one needing saving? In a cursory look through the White Saviour list, it seems to me that some have been included that, while technically having a "white saviour" lead, do not belong on a list critical of the type. For example, the ones based on real events shouldn't be criticized for portraying what really happened. I guess we could have "Blindside" changed to a story starring J C Watt, with the mother role played by Kerry Washington. Or maybe the Cool Runnings Jamaicans could have found another black bobsledder to "save" them. Or maybe the film could have been about some likeable hard-trying but low skilled white team. True, the Avatar people were "of color" although blue isn't that common, but the white guys in general were the bad people. And the "white saviour" was able to help them because he had information about the invaders the blue people didn't have. I we could just leave Jake out of the story and let the Na'vi be attacked and successfully save themselves, but the storyline might be a little flat.
Maybe the list authors have a point that the (mostly white) film producers have made too many films with (mostly white) heroes to sell to a (mostly white) audience. But I think that "...white savior stories have been described as "essentially grandiose, exhibitionistic, and narcissistic" fantasies of psychological compensation." is a bit of a stretch.
. Or, it will be 
