Not where I live. A Five Guys little cheeseburger is maybe 20% more than a quarter pounder with cheese. It's true that Five Guys serves mostly exclusively the suburban markets that support higher prices, and doesn't compete with the cheapest McDonalds. But where they overlap, they're very comparable in price.

And yeah, Five Guys is the best.

Reading a menu I found online it seems you’d pay over double In-n-Out prices for (subjectively) at best comparable eats.

100%. I’m always surprised by the price when I go to five guys. They give off fast food vibes but with very high prices.

Very high quality burgers though.