Based on the just released UJA 2012 Jewish population study, the forward reports that “Among the Orthodox, ultra-Orthodox Hasidic Jews are the largest group, at 16% of the Jewish population of the eight counties counted in the survey. They outnumber both Modern Orthodox Jews, at 10% of the total Jewish population, and non-Hasidic ultra-Orthodox Jews, at 6% of the population.”
That means that within Orthodoxy the Chareidim make up 69% of the population (the Chasidim alone are 50% of the overall Orthodox and the Litvish/non-Chasidish are 19% of the overall Orthodox) while the Modern Orthodox represent 31% of the Orthodox. So the OP was pretty much on the button.
Also, according to the UJA 2012 report, half of the non-Orthodox marriages between 2006 and 2011 was to a non-Jew.
And while Jews make up a slightly smaller proportion of the population in New York than they did a decade ago, they are way up in Brooklyn. Now, 22% of Brooklynites are Jewish, compared to 18% a decade ago. So while Brooklyn is becoming more Jewish, the other four boroughs of NYC are becoming less Jewish.