I wonder if the reason this dress color thing has been spreading around so fast is because of the different devices everyone is using to view it. When I first saw the dress on my Macbook Pro screen (non-retina) the dress looked white and gold. Then I checked on my iPhone 6 in the dark later on and it looked blue and black.
I've been seeing articles about how the reason people are seeing different colors is because of different types of eyes, psychology, etc...maybe the answer is much simpler.