The title of the article suggests that it was a mistake to leave NYC for Palo Alto, but there is nothing in the article which suggests Palo Alto was the problem. You may as well have titled this article "I got screwed by a guy named Ted".
It would probably still have been easier to move forward and develop your app in the Valley. I've been to General Assembly and it's a nice venue and I hope it continues to grown. But you can't suggest that the interactions and people you will meet there will compare to they types of advisors, investors, developers and potential CTO's you would have met in the Valley, or even just in Palo Alto.