Yup, I read it, and I read it months ago too, it's come up a few times.

What I'm saying is that it's absolutely possible to quickly and efficiently say those quality thoughts that springs to mind, in a respectful manner. And yes, it is a skill people should learn because it gives you a superset of advantages compared to if you don't. You can talk to a wider slice of people, and learn more from them as well. It's not very time-consuming or laborious, either. If I'm able to communicate my thoughts to you in a respectful manner, why would I change to be brutal about it? Once you know both, you tend to see that the brutality, aside from its other disadvantages, is simply superfluous.