My group has been collaborating for weeks on our application. I think we must be on our 5th draft by now. At a certain point, I do feel like it's unproductive to keep second guessing how our answers will be parsed - we're just doing our best to listen to the great advice out here on HN, lay out the facts about ourselves, and hopefully make a good impression. Hopefully YC will like what we have to say!
BTW - my group of 3 is quitting Google, Facebook, and Microsoft to pursue our idea, and we will definitely do it with or without YC. It'd just be super nice to get that level of support.