I would expect that one develops skills mostly by practicing, and extraverts typically get more practice with social interaction, simply because that is how the

I would expect that one develops skills mostly by practicing, and extraverts typically get more practice with social interaction, simply because that is how they enjoy spending their free time. On the other hand, introverts may compensate e.g. by reading literature on social skills, or spend more time reflecting on what happened; and unless they are isolated, after a few decades they also get lot of experience. While extraverts may get stuck in the "high-school style of human interaction" and have difficulty move forward. Overall, I would guess that an average extravert will be much better than average introvert e.g. at small talk. But if you need a specialist, e.g. a therapist, the chances are more balanced, because for either it requires going beyond just following their instinct. But this is all just a guess. > There's also something else I've noticed, which is that leaders are often perceived as effective when they're leading people whom their leadership style is compatible with. Yep. But imagine that you have ten people in a room, five extraverted and five introverted. The extraverts will create a group in the middle of the room, and introverts will sit alone near the corners. If you randomly pick a leader, you will probably tell them to lead the group in the middle of the room -- and that is a task better suited to an extravert.