As an introvert I really enjoy articles like this. This world really considers us inferior in many ways, and it's easy to let that get to you. Seeing other introverts speaking out and thinking to myself "yeah! that's me!" is very refreshing.
Quiet: The Power of Introverts really opened my eyes to the fact that other people feel the way I do and that it's alright to be "introverted". I highly recommend it if you haven't read it and this type of subject matter is enjoyable for you.
I came here to recommend the same book, so I'll just second your recommendation. The writing is sometimes a little too cute for its own good, but it's an excellent read.