According to the map, every single county in Connecticut refers to it as soda in the 80-100% category.
<Grammatical Rant>
I always get annoyed at the general "coke" terminology, especially when people use it to refer to non-cola soft drinks. It's one thing to use it in a general sense for any cola soft drink, but when someone once asked me "Where'd ya buy the coke?" when I was drinking a Mountain Dew, that's where I draw the line. 
</Grammatical Rant>