some good information here to clear up some of the major misconceptions and stereotypes that seem to be assumed here:

Let's Quit It with the Introvert/Extrovert Nonsense

The Differences Between Extraversion and Introversion

some excerpts:

"...Jung described extraversion and introversion as “attitude types”. An attitude type refers to the type of energy with which a person goes about life. Introversion doesn’t merely mean shy and extroversion doesn’t always mean “life of the party..."