I can't speak to NYC - best case it would take me 4 hours to get there (.5 to the airport, 1 hour security, 2 hours on the plane, .5 from ny airport to the city). Meanwhile I can get to nearly anywhere in my entire MSA in less than an hour, both city and suburbs (and even a few farms). Within that the majority of ethnic food is in suburbs, though the largest concentration is still downtown.