Based on these results, I think it's hard to argue that race is the most salient variable that determines one's support for Bernie Sanders. Some of Hillary Clinton's strongest wards are affluent white neighborhoods and some of Sanders' strongest wards are rapidly gentrifying neighborhoods. Further, based on these results,I think we can say, with a high degree of confidence, that Sanders' strongest neighborhoods in New York City will not be those filled with "creative class" types but rather neighborhoods filled with pioneer gentrifiers or lower middle class/working class ethnic types in Queens.
Not really a surprise to me. I would expect areas that are a bit gentrified and "hipster" to be heavily for Sanders, but wealthier, more established areas where gentrification is long complete to be weak for Sanders.
This is true in Canada where the social democratic NDP does well in these sorts of neighborhoods in Toronto, Vancouver and elsewhere.