To say New York is doing a great job is way too early. It is wishful thinking.
No, it isn't wishful thinking. First, because we know the method works in China, Korea, Japan, Greece and other countries. If it is done right, it has to work, biology being the same everywhere. That's science for you. Second, the project began on April 22. Cases had fallen before that, but they were starting to increase. Soon after the project began you see a continuous, dramatic drop off in cases. This was before the lockdown ended. It cannot be a coincidence. There is no such drop off in states with no tracking and warning, such as Georgia and Texas.
New York:
Georgia, stable; no decrease or sharp increase:
Texas, continuous increase:
The difference is dramatic.