there was a thread here a week or so ago about what people call a soft drink in different parts of the U.S/Canada.
this is why the Internet rocks
http://www.ugcs.caltech.edu/~almccon/pop_soda/
Great Lake states are solid 'pop'.. west coast and NY are 'soda' and man look at all the red areas in the South, these people refer to all soft drinks as 'Coke'. um............. insert inbred moron joke here. This would be like referring to all pants as 'Levi's'. Or calling all pets 'dogs' even if it's a cat or a parrot.