Way too much scrutinizing here. There is supply out in the wild which makes for the need to over produce not there. No big deal. I really wouldn't judge about the 5c's success or failure till after the holidays though - that's when the mainstream shoppers will come in hordes to pickup the latest gadgets for their loved ones.
Agreed about the premature conclusions. And as far as the upcoming holiday shopping season is concerned, I believe you again hit the nail on the head; far many more 5Cs will be gifted to teenage kids, than 5Ss. Also a large-scale roll-out to countries outside the US is just getting started, so to some of the naysayers above, let's not jump the gun with gloom & doom declarations.
In addition, I wonder if this shift in production might perhaps also have to do with a more plentiful supply of those fingerprint sensors, the initial lack of which was limiting Apple's total production of 5Ss.