The metrics I causally track are private companies that I would want to work for, or products people in my social circle are using. BuzzFeed, Venmo, ClassPass,

The metrics I causally track are private companies that I would want to work for, or products people in my social circle are using. BuzzFeed, Venmo, ClassPass, Casper, Warby Parker, Etsy, DataDog, BirchBox, Kickstarter, and Oscar are all established startups headquartered in NYC which fit that bill. If you wanted to work for a big company, the only two I can think of that don't have a presence in NYC are Netflix and Apple. Risk tolerance may be slightly higher in SF, but NYC has 10x the population and it is becoming cheaper to start a startup every day. I've also seen more than a handful of world class developers move from SF to NYC in the past year.