I too am from Upstate and we never call it pop. I've might have when I was a kid, but then I turned 11.
It's Pop in Utah and Idaho, if anyone cares.
I've had a similar experience with the Coke being all inclusive when I was traveling through Tennessee, but it was like that in Brazil (Guarana is a fruit soda, but also used as a generic blanket for all sodas) so I just responded I wanted Coca Cola when they asked what kind of Coke.
it's always been pop here in Michigan