Brian Fagan > Status Update

As an introvert devotee of fantasy I cannot confirm - I do however work in frontline retail (and like a nice bit of character-driven found family)

Introversion and extroversion as labels are based on preferences in social interaction - introverts feel more tired and less energized by interacting with lots of people, and vice versa. So, if people read about things they don't get in real life, an introvert won't necessarily feel that they're "missing out" by not having lots of regular interaction in large social groups, and therefore they won't necessarily want to read about that. Likewise an extrovert won't necessarily want to read stories with little social interaction, because that might not sound like a fun time to them.

In any case, people read for all sorts of reasons, even when reading for escapism - they might read about things they'd love to do in real life but can't, or they might read about things they wouldn't do or seek out in real life but enjoy reading about in an escapist way. An introvert whose life involves a lot of enforced social interaction (e.g. because their family, co-workers etc. are raging extroverts who think anyone who's on their own must be miserable) might read about a character enjoying a solitary life for escapism, for example - or they might not (e.g. they might read about a character who is good at taking charge of a room, navigating complex webs of social interactions etc., unlike them).