blacks can choose where to live more than in the past and can now choose places with good schools for their kids. whites aren't having many kids so many don't care about schools. obviously there's more to it, cities are better places to live for those that can choose than in the past, etc. places like rittenhouse are becoming "oh you just have to have a condo down there for weekends" for people with that kind of money. of course, the biggest changes were around temple.
I agree that it would be nice if someone could figure out how to get hispanics to come south of girard and spice up nightlife but if you're paying attention, center city east grew in every category (including hispanic) except black...in other words, it became more diverse. we saw it when we lived there.
"It has shown me that everything is illuminated in the light of the past"
Jonathan Safran Foer