Happily Ever After
User testing is not the be-all and end-all of the design process. You still need to make judgement calls about what a product is supposed to do and what your target market wants to see. It's also important to remember that people are not the most reliable witnesses, even of their own behavior. Everyone in a test may say they hate your green background, yet when you take it away, they miss it and ask for it back. Look for the underlying patterns in what people say - don't try to follow their desires verbatim.
But if you do put your product in front of people and make them use it, at least you'll have some idea of how the real world is likely to react to your brilliant idea. And that, in a universe where a week's delay could mean life or death, is a major advantage.