Re:Not necessarily introverts (Score 1)

I totally agree ... affinity for IM, or lack thereof, is not a function of introversion/extraversion in my experience. I'm a hardened introvert, and I *love* IM and text messaging ... it saves me from having to talk to people on the phone, which is the bane of my existence. I've introduced many an introvert to the wonders of IM and SMS, and they almost universally sing the praises of said technologies ... once they learn to use them in a way that fits their own communication styles.