“I'm sorry I wrote such a long letter. I did not have the time to write a short one.” -Abraham Lincoln
If you are prepared enough, your meeting or presentation would be shorter. If you took the time to think and plan how you will drive your ideas clearer for the attendees to understand, you'll see that it will be succinct. Your explanation would be direct and to the point. You'll only use terms that will help you achieve your goal. No unnecessary words, phrases or sentences. No wasted time for them and for you. That’s why when we are unprepared, we tend to take a longer time to make people comprehend. So, on your next meeting, be very prepared and try to make it half as long as usual.