The problem with this line of thinking is that, like most other things, introversion/extroversion is not binary; it's a spectrum. The Myers-Briggs type indicator (considered as borderline pseudoscience by many) places me, for instance, in the introvert camp, but the tests suggest that I'm only 6% into it, which makes things way less clear-cut than one would be inclined to believe. Relying on it being a strictly binary identificator opens up the possibility for all types of these interesting speculations and categorizarions, but they all break down when you realize the complexity of human psyche very resiliently defies them. An introvert who can effectively pretend and act like an extrovert (which is a skill like any other) can be a better entrepreneur than an extrovert who doesn't know how to use their extroverted tendentions for this particular use-case. I'm not contending that the article is completely false, but the overall conclusion is too exclusive ane definitive to be applicable to humans at large. People with the skills that define entrepreneurs are good entrepreneurs; their other characteristics may help them or not, but no effective conclusions can be drawn from such a narrow point of view as the one presented in the article.