Maybe because they're both so tasty! :) (And In-N-Out patties aren't really that thin - as in McDonald's thin.)

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Umm. Just had lunch at the Five Guys at DCA. Excellent.

Very good hamburgers and fries, I try to avoid it though due to the mental image of what would happen to my arteries if I indulged as much as I would like to at Five guys.

I have also discovered that Five Guys burgers and fries are a pretty decent hangover therapy.

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There's one in the airport? No fair... :(

Granted my layover in DCA was outside its operating hours (AS 6 was 2+ hours late getting in past 11 @ night and leaving on 5 @ 9 AM...)

But I digress... :p

My guess is because they are the same "style". Hand made burgers, hand pulled shakes, fresh buns, and fresh cut fries. But 5G also has a few things that InO doesn't, such as hot dogs, cajun fries, and bacon (not to mention the peanuts). I am sure I am forgetting a few other menu differences, but I try not to go too often.

Yep. It is right across from the US Air shuttle gates. I usually take the train to DC. Second choice is Delta shuttle. I wasnt getting the ticket myself this time and they have a contract with US apparently. For a variety of reasons the train didnt work this time and when I arrived Wednesday night I noticed the Five Guys there. Made plans to have lunch there when I returned Friday afternoon. Might make me fly US a bit more on shuttle flights. I suppose I could do DL to DC so I can use the Marine Air Terminal at LGA and then US back so I can eat at Five Guys ;)

The first time I tried Five Guys last fall, I wasn't impressed at all.
I did have Five Guys yesterday for lunch and really enjoyed it, but what annoys me is the ala carte pricing. If I had wanted a burger, fries, and a soda, it'd have been nearly $10. That, to me, is a little too expensive.

Yes and no. The key is to go with someone. As I said above, the regular sized fries are more than enough for two. And the regular burgers are two patties of meat (a small is one), so it's definitely possible to get a substantial amount of food for well less than $10.

Yea, I threw half of my fries away.

Fries are the best part.

I like the burgers a lot. But yes, the fries are very good but way too much for one person.

Well... their large is pushing it :p (just don't drink too much water with lemon :D)

...but if you ordered the ketchup, mayo and relish you can approximate a T-I topping if that is what you are jonesing for and you are at a FGs.