[quote=TheLonePup]
He's not an animal though >.>But Ellie's high intelligence (even though her charisma is average, which is why she talks like a raider >.>) allowed her to realize "hey, everybody around here treats him like shit, I should be on his good side so that when te bullets tart flying or I have. Deathclaw chasing my ass he won't be worried about protectin the other asshples and will protect the only one who was nice to him"That's why she is trying to befriend him, plus he absolutely fascinates her because she's neve seen someone THAT mutated other than the few trogs that roam around the Mill and he can at least speak so it shows he's much more intelligent (on top of the fact it's hard to be any dumber)
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Mechanically Intelligence only goes as far as technical knowledge with benefits to the Science skill and extra experience points gained, or additional skill points to allocate on a level up.

Outside of game mechanics high-intelligence characters doesn't mean that their IQ translates well into street smarts. You can have a really bright and sharp character, or be that type, but you could be as dumb as a rock when it comes to personal interaction and picking up on social queues. As a off-the-top-of-my-head example: Spencer Reed off of Criminal Minds would be just that. Guy's character is Einstein 2.0 but he wouldn't be able to tell if you're either teasing a person or being genuinely offensive, he's a social retard.

One might say he's "autistic" and watch him fumble with it trying to point out it's a broad mis-diagnosis and makes the insult even more fitting.

I guess ultimately in the end I can refute that statement. You could certainly make the claim but without good people skills to compliment high intelligence I don't think a person would be able to pick up on and decide to go against the direction of social shit unless they got a moral compass that says it's wrong always, period. But then that begs a whole other series of questions. I can't see a person of average social intelligence leveraging the situation like Petyr Baelish.