NP > The Yeshivos where (and continue to be) the most effective means of mass outreach. Both qualitatively and quantitatively.
I don’t think so. Yeshivos achievements are in outreach to those who are ortoprax but not learned much and don’t know how to teach their children, which, surprisingly, includes those who went through the yeshiva system themselves. But it does not include many other groups. According to knowledgeable people, US Jewry consists of 2 millions who are in the Jewish derech and will increase in numbers and 4 millions who are on the way to assimilation. These are staggering numbers. I am just off a scientific conference where I was approached by 1) non-observant Jews 2) Jews who used to be observant 3) non-Jews married to Jews waho curiously remarked that he now found it that his kids are Jewish …