"Yup!"
They're good.
But they're not that good.
And there's not a Texan alive who can't do better in his own backyard.
In & Out is better than McDonald's, Burger King, Wendie's, Whattaburger than the rest. They can legitimately lay claim to being the best fast food hamburger.
Fresh beats frozen...every time.
But there are a dozen joints in the Dallas-Fort Worth area who serve hamburgers that surpass In & Out by a country mile: Keller's Drive-Inn has a chili-cheeseburger that is heaven sent...Grump's is a virtually perfect hamburger and fries...Kinkade's specializes in enormous burgers...there is a Tommy's in Lake Worth that pumps out some powerful burgers and fries...Charlie's, though, on Granbury Road in Fort Worth may be the very best of all.
If In & Out puts McDonald's out of business, it will be a net gain for the area. But they don't have the best burger in the business...not by a long shot.