Americans value the ability to make decisions and act rather than deliberate indefinitely. They admire people who can reach conclusions under uncertainty and commit to courses of action. Prolonged hesitation, inability to choose, and endless analysis frustrate them.
In American contexts, making a reasonably good decision now is often valued more than making a perfect decision later. This does not mean Americans are reckless—they gather information and consider options—but they expect this process to lead to decision and action within reasonable timeframes. Windows close; opportunities pass; the person who cannot decide fails to lead.
When you work with Americans, be prepared to make calls with incomplete information and to move forward rather than waiting for certainty that may never arrive. They would rather adjust course after deciding than never get started.