I'm not 100% sure, but I don't think any YC-funded startups did. The problem is that you have to launch at the event. Most startups can't plan their launch so precisely so far in advance.
You should launch as soon as you're ready, and no sooner. Usually you don't know when that will be till a few days before.
You should launch as soon as you're ready, and no sooner. Usually you don't know when that will be till a few days before.