I'd be curious to find out what the manufacturing numbers were of each of the three choices. Normally I would assume more base model bikes were built than the S models, and the least built would be the white bikes, probably something like 50%, 30% and 20% respectively. But that's only a guess and a SWAG at that.
I think there's a bit of psychology behind all of this as well. People who paid top dollar for a white S are probably more likely to seek out like minded people and find some confirmation bias in their choice. Red S would come right behind that for similar reasons. Red standard bike owners are least likely to do so, and also least likely to vote in the poll (even though it's anonymous) to avoid being in the perceived minority compared to the more expensive bikes that happen to be better represented in the poll.