The article does mention it.  College educated white folks are moving to the City to get higher paying jobs.  The article also talks about how immigrants are integrating, it just doesn't happen overnight.  If you did move you wouldn't understand their entire culture the minute you stepped off the plane, these things take time.  This little nugget from the article suggests they are integrating: “You’re seeing the community accept that. Those kids are all participants. The Johnsons and Thompsons know the Ruizes. They break bread together, they go to church together."