I live in Northern Kentucky and say "Coke." If the restaurant serves Pepsi and say "Sorry we only have Pepsi products" I'll say Pepsi and just think "same difference" though I know they are not.
I know many people who do the same thing
If not "coke" I hear "soft drink" but I rarely hear "soda" or, especially "pop."
And on that survey, 21 of the 53 in Campbell County also said Coke, the most of any of the choices. I fit right in