It wasn't a diss to Detroit, more of a shot @ Gilbert.
Listen, Detroit is not a luxury city by any stretch of the imagination. It is a city with many people willing to work hard for a living. It is a up north city, with an up north attitude. Work hard, grind, and hopefully save enough money to enjoy yourself on the weekends.
Tearing down nearly 80,000 homes? Do you realize how disrespectful that looks? Essentially they are saying that whatever the previous people in Detroit built is not worth saving, wipe it from existence and start from scratch. I am willing to bet that fixing those abandoned properties has to cost less than $8,500 on average.