There's a time and place for a good long meandering and elaborate backstory! Interesting conversation and discourse is something you should cherish and continue to develop. So, don't get me wrong, punchline first is not a rule, not always the goal. Just be aware of it, and you can start to decide which one to use. For job interviews, punchline first is good advice. For talking to your friends, it depends. For giving a talk or telling a story, backstory might be critical. Start playing with it and see how people react, find out when & how starting with the punchline is better. I think the point of the article is that punchline first is a tactic to get the other person talking and asking questions, rather than you talking for 5 minutes.