I went to college with a few homeschooled kids. They were by far the least capable of "normal" social interaction. Some were quite book smart, but they had trouble communicating with others, so they couldn't demonstrate it.

Also a fun side effect, they mispronounced a lot of words that they had only ever seen in books but never heard out loud. One of them was self-aware enough to ask us to correct him.

>> they mispronounced a lot of words that they had only ever seen in books but never heard out loud

I did that as a kid. Still do. I read more than I talk. Nothing wrong with that.

The flip side would be people who misspell words or get phrases wrong because they've never seen them in books, they've only heard them out loud. They talk more than they read. Nothing wrong with that.

Although both of those might be a clue as to what type of vocations would make someone happy.