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<p>But the accent (or lack thereof) on speaking is just one possible shortcoming. A child that grows in an intellectually inclined family is much more likely to get a lot of resources that help their future academic records, from parents that get involved with their grades/school progress to trips to museums, meaningful summer camps and small little things that stimulate young minds (even if by the child observing their parents talk about something one notch or two more complex at dinner table than the last Jerry Springer show).</p>
<p>So if you take any group of children whose parents are overwhelmingly more educated than the average person, they will be likely to have a better learning environment at home, at that advantage makes up to some language disadvantage. </p>
<p>Moreover, in all likelihood crackheads, highly dysfunctional individuals, alienated and lazy adults are unlikely to be high skilled, thus unlikely to arrive in that condition in US as immigrants.</p>
<p>I bet US born children of high skilled immigrants perform better than the average American kid in school by mere selection bias effect. Even the US-born children of high-skilled Caucasian, Middle-Eastern, African, Latin American (“Hispanic”) immigrants.</p>