A study in 2010 reported that of the 164 sales of $3M+ homes in Vancouver's West Side (richest area) and Richmond (largest chinese suburb of Vancouver), 74% went to buyers with Chinese last names. This number was 46% in 2008. Not the most scientific study for many reasons, including 2nd/3rd gen Chinese, but knowing Vancouver, that demographic doesn't intersect with the affluence much at all. This "study" wouldn't work as well in SF, but you get the point. There is a lot of yuan coming to the west coast.
http://www.theglobeandmail.com/life/home-and-garden/real-est...