According to NPR, the answer is yes. They published results of a 10-year study involving more than 3,000 young men and women, most of them in their 20s.
The “second generation” project looked at five groups — Russians, Dominicans, South Americans, Chinese and West Indians — and compared them with U.S.-born whites, Puerto Ricans and African-Americans. Researchers found that most in the second generation were fluent in English and working in the mainstream economy.