One has to wonder why they went for a plastic phone at such a high price? Could have easily went for a steel or aluminum phone and maybe dropped it to a 5mp and used an A5 chip.
I wait the tear down video which will reveal the real cost of the Iphone 5C.
My guess is it's plastic to make the more expensive metal one look better.
Why would you buy a 16GB phone when you can get a 32 for a little more?