My understanding is that most people with ASD are in fact not "natural" introverts, perversely enough. That is to say, were it not for their poor social skills, they would be extroverts.
Rings true for me, I've worked hard to socialize and try to talk to a stranger everyday for at least 30 minutes. It's painless now, and I'm loving where I've come along my journey. It's been hard, but really well worth it.
It all started with me working in a call center 7 years ago...