I really don't think they are doing enough. The virus is still growing at an exponential rate, and when you look at the other countries that managed to get things under control vs. the ones that didn't, the actions that NYC and the rest of America are taking fall squarely into "this looks like the ones that didn't get things under control."

Public transport needs to be disabled. People need to be required to wear a mask when they go out. Police need to enforce people staying inside.

Italy got the growth rate down to 15% per day. That's still enough to hit the whole population by early May.