I assume it's shtick but you gotta know that ordering the fries that way is obnoxious and you're likely being ignored. I can't imagine you actually sit in the drive thru line, swish a few around your mouth and deliver a verdict.
I'm going to start doing this.
"Alright, here's your order sir, have a nice day!"
"Hold on, there Betty. Before I pull off, I'm going to make sure my medium french fry order meets my criteria of 'hot, fresh and crispy' and not a moment sooner."
"But sir, there's 17 cars behind you, one of them has spinny rims and the other has a dead deer carcass on the grill. I don't think......."
"ENOUGH! I will expect nothing but perfection from my $4.73 meal!!!! You and EVERYBODY will wait right there. *Inserts three fries, assiduously chews the hot potato goodness, moving them around the tongue so the morsels dance on his delicate papillae, alternating like a boss between salty, bitter, sweet and umami like a truck driver smoothly shifting his 18 gears. He pauses, spits them out of his window and begins barking
"GOD DDDDDDDDDDDDAMNNNNNNNNNN IT, Betty! What is this...this...MUSH you've given me? You take these back and you make me a fresh pot of fries that are, IN NO PARTICULAR ORDER: HOT. FRESH. AND MOTHER FORKING CRISPY!"
"O.....Okay sir. I'm really very deeply sorry, if you'll just pull up ahead and...."
"DAMN IT GIRL, I'M NOT MOVING AN INCH UNTIL YOU PERFECT THESE FRIES!"