Poll
54%
23%
23%
Born and raised up North (Michigan) it was strictly "pop".........I never heard one person say "soda". After moving here to the midwest, borderline South (Kentucky) it is "Soda"........I havn't heard one person call it "pop".
There is definetly a geographic border on this subject........southerners tend to stick to the "old ways".......they shun change. In the 50's they went to their local diner and ordered a Soda shake.......today they go to their diner and order a soda shake.........
Being British the term 'Soda' is very rarely used, the term 'pop' is used more commonly but has two different meanings:
Pop (Def #1) ~ Used to describe a genre of music that includes Britney Spears, Madonna, Busted etc, music that is popular.
Pop (Def #2) ~ A fizzy drink such as coke, lemonade etc.
So with that in mind i'd have to go for Pop (Def #2 that is).