Anecdotally, homeschooled children often speak and behave more like adults.

Whether this is a positive or negative thing depends on the situation. Being precocious is something adults might think positively about (though not in all situations) but it's not something other kids usually admire.

I think you are right that this is situational. I can understand it potentially hindering relationships with other like aged children who are traditionally educated. I can only say that I like my kids a lot, which is nice as a parent.