I have heard and quoted this for years, but I'm actually questioning whether it is true now. It just seems unbelievable when you think about it, and sort of feeds the "noble savage" trope. Out of hundreds of thousands or millions of Native Americans, there MUST have been some youth, at least one, seduced by the promised of western culture and voluntarily left their tribe and moved to a city or something. It just makes for a better story the other way around. Whether this was documented is another matter I guess.