The editor of Talkingpoints Memo made a really good point early this week [1]. Just a bit more than 0.1% of NY residents have died from known covid-19 infections. This sets a lower floor of the actual mortality rate, since even if not a single other person died of it in the future, and not a single person died from it but wasn't counted, and even if 100% of NY residents are/were carriers, the mortality rate would be 0.1%.
But an early test shows about 21% infection rate in NYC (tested by serum levels of antigens), and certainly people will continue to die of it, and certainly there are many people who died of it but aren't recognized. Conservatively, the actual mortality rate is at least 0.6%, a multiple greater than the Stanford study.
[1] https://talkingpointsmemo.com/edblog/have-fatality-numbers-f...