Sometimes yes, sometimes not, no? Let's go with Chris's example of India: sure some in northern India now eat "dosas" and some Hindi movies too run for 400+ days in Madras, but as Carrol describes it, they are quite a bit insulated from each other as well. And the same seems to hold for the communities in the Queens or here in New Jersey. A good contrast would be the assimilation of Indian culture and language into England (for understandable reasons). Most USers idea of an Indian is the racist depiction in The Simpsons. Anyway, feel free to ignore me... I didn't even quite get the original point, which now is probably far from whatever it is that DDR wrote in his paper.
--ravi