[PhantomGremlin]

Isn't this just good advice overall? The key insight in the article is in the title and repeated toward the end:

   All I did was shut the fuck up
   and let it play out in front of me.

Aren't many of us often a little too eager to jump in to add our two cents, even when speaking is redundant or unnecessary? I know that it's a foible of mine!

PS I hope this post itself isn't "redundant". :) I'm trying to make the larger point that the article's advice should be viewed more generally than just for sales negotiations.