I don't buy this. At work I used to have tons of problems with people that communicates little. The ability to communicate fast and the ability to use the right words to make clear what you mean is vital.
Also instead to do useless work because you can't just tell in five seconds if this is going to be OK sucks. A lot of wasted work. I think that the ability to communicate well is very important IMHO, and it's unrelated to being introverts or extroverts as far as I can tell.
I'm not sure I understand your point. You're saying that an article claiming that introverts have strengths that can make them good leaders is invalid because people need communication skills. But then you claim that that's not really related to introversion/extroversion?
Also instead to do useless work because you can't just tell in five seconds if this is going to be OK sucks. A lot of wasted work. I think that the ability to communicate well is very important IMHO, and it's unrelated to being introverts or extroverts as far as I can tell.