Caught an interesting article, in the October 28 Wall Street Journal, on Univision, the Spanish language television network. It enjoys some 58% of prime time audience, something the "major" networks can only dream of. But - steadily, over the last several years, it's losing its under 35 following. Seems the kids are learning English.
Much of the often acrimonious debate on the immigration issue involves the rate of assimilation (or the claimed lack there-of) of the newcomers. One might well argue that the rate of learning the native tongue is the best indication, of assimilation, one way or the other. And TV viewership provides quite a large sample.
As I've noted before, working in janitorial service, particularly in the area of Phoenix, Arizona (we tend to be on a bit of an immigration corridor), introduces one to a large number of recent immigrants from south of the border. My perception has long been that they are assimilating into American society about as fast as any other immigrant group has over the centuries; the children are often discouraged from speaking Spanish even at home, in an effort by the parents to make a better place for them in American society, and the economy. It calls to mind the nice Greek girl I dated a bit after college; she was a little upset with her parents for refusing to teach her Greek, which would have better connected her to her ancestral culture, as well as given her the benefits of being bi-lingual. And I can tell you, from (brief) experience, learning Greek as an adult is no picnic.
Further, as far as I can tell, the desire to work, and the entrepreneurial spirit, are stronger among Hispanic immigrants than among those who have been here for generations. And I've yet to see any firm evidence of higher crime rates among recent immigrants, legal or illegal, than among the rest of us.
Teddy Roosevelt opined that, to be welcomed as an American, one should get a job, keep out of trouble with the law, and learn English. That seems to me a pretty fair formulation.