It's (always) too soon to know for sure

if you're racing, you are always going to have to make decisions on less than perfect information. Given that you will never know everything for sure, some of the issues are: What's the cost of waiting one more day? Are you waiting (or not waiting) because of the cost of being wrong, or because loud people are yelling at you? Is the risk of being wrong unreasonably amplified by part of the market or your team? What if you ignore them and focus on customers that matter? And have you thought about the costs of waiting too long? If you don't, you'll probably end up last. (blog) Seth Godin, "It's (always) too soon to know for sure," July 28, 2010

http://sethgodin.typepad.com/seths_blog/2010/07/its-always-too-soon-to-know-for-sure.html