Aside: Please forgive the nitpick, but despite its widespread use I really don't think "extroverted introvert" is a thing. The problem is that these two things are opposite ends of a spectrum. I think what people really mean when they say "extroverted introvert" is one of two things:
1) Ambivert : "a person whose personality has a balance of extrovert and introvert features"
2) Introvert, but not shy : It is a common misconception that introverts are inherently shy. The two are correlated, but not the same thing. You can be introverted and not be shy, either inherently or by learning to overcome shyness. Extra/introversion has more to do with your preferences and where you derive energy from. Shyness is more fear-based, and fear can be overcome.
Anyway that's not really a critical part of your article but I've sort of unintentionally become a Myers-Briggs nerd over the years and enjoy discussing stuff like that :)