So, is it really who talks the loudest and longest that wins an argument?

I have noticed a trend, not only here but in real life also, where trying to talk the loudest and long enough to get the last word in no matter what seems to assure folks that they have won a debate.

Is this true? I have always felt that a good point is just that, a good point. You have your say, you drop the mic, and walk offstage.

What do you folks think?