Some thoughts:

1) Am I the only one thinking, that some of the terms used to describe introverts: "guarded," "loner," "reserved," "taciturn," "self-contained," "private", have since long been stopped to be considered as negatives?

2) Think, Introverts easily command more respect, on an average, than extroverts (no data to back this up. Just my perception). Even extroverts, based on my anecdotal experiences, regard introverts with a lot of respect, as high achievers often tend to be introverted.

3) I like the definition though: "introverts are people who find other people tiring"

4) Think, >=70% ppl on HN are introverts. [ A poll could confirm this ... or break this :) ]