Apple sold more than nine million iPhones over the weekend. They haven’t shared the breakdown of sales between the 5s and the 5c (and they probably never will), but I only know of one person who got a 5c: Gedeon Maheux. I’m not trying to imply anything, just share my personal observation and data point.
It’ll be interesting to see in one and two years from now how many of the 5c (and its predecessors) we begin to see in the wild compared to the 5s (and its predecessors). I think the white 5c looks great; if the modern tech of the 5s were also available in the body of a 5c I probably would have gone that route.