In the US, maybe, but I don't see it selling well anywhere else in the world. In growing markets like China, India, South East Asia, etc., very few people are going to buy 5cs when phones like the Xiami Red Rice (
http://www.gizchina.com/2013/07/31/x...mt6589t-phone/), a pretty damn awesome phone for the price, is retailing for $130 brand new. In Europe, people will keep on buying mid range phones like the Xperias or the Galaxy Minis and what not. I see tons of those things around nowadays.
Edit -
http://daringfireball.net/2013/09/iphone_5c_5c_event
I think Gruber has it right. The 5c will be the mainstream model, and the 5s will be the model for phone geeks. I can see this strategy working well in the US where people are too dumb to realise they're only saving $100 over two years by buying a cheaper phone. It won't work anywhere else, though.
Overall, the 5c feels slimy to me. It's not about making a better product for consumers: it's about improving Apple's profit margin. Fuck that.