In talking about surveys and polls, XKCD had a great comic about 12 years ago saying that the area code of your phone number indicated where you lived in 2006. When you're doing surveys, it can be anywhere in the country now. The numbers no longer have any geographic coordination.
Mr. Morin, what is the effect of this in real terms? It seems that it would be exceptionally difficult to figure out what's going on in this circumstance.