It could be your answer was complete, succinct and technically accurate .. but it could also be that you didn't answer the question he asked.

I know that my weakness is in giving too much detail up front (being left-brained and all), so I have learned to package up my answer as 'short answer/long answer'.

You can even ask your boss to confirm that question that they asked: "So, you're asking if product X will do Y under the circumstances Z?" .. and then answer that.