CTRebbe: You’re missing utilizing the Pew Research study of American Jewry, 2013. It’ll add context of how what they call “Ultra-Orthodox” (i.e. what is also referred to as Chareidim and includes both Yeshivish/Litvish as well as Chassidish in one statistical category by Pew Research) have become a super-majority of American Orthodox Jewry, with Chareidim constituting almost 70% of American Orthodox Jews nationwide in 2013. It was an increasing majority until then and has certainly increased even further since 2013.
What Dr. Marvin Shick’s studies for Avi Chai demonstrates, by looking at not just his 2013 study but rather at at least his two studies prior to 2013, is that the Chassidish population rate-of-growth far outstripped anyone else, including the Yeshivish/Litvish. The Chassidish schools were in his earlier studies smaller than the Litvish but the rate of growth of their student bodies year over year (calculated by comparing the earlier Avi Chai studies to the most recent one) demonstrates a far higher rate of growth.
Also, I’m not Chasidish and don’t live in any of the enclaves.