I once interviewed 40-plus clients of a major Canadian corporation. "What does good look like in a written proposal?" I asked. The consensus was that conciseness is good. "Edit and summarize," they said. "Cut to the chase" came up a lot too.
Check the length of your next proposal. What words and sections could you eliminate? What if your customers demanded a one-page proposal? What vital information would make the cut?
Mark Twain said, "I didn't have time to write a short letter, so I wrote a long one instead." It takes time to edit yourself. (This tip took 25 minutes to write and rewrite.) Time-starved customers might see your conciseness as a positive point of differentiation. Don't take my word for it. Ask them the question in the second sentence of this tip. Your competitors aren't.