Wow, this is counter intuitive, and not what I thought was going on. I saw this going the other way entirely. I thought price driven (and color driven) buyers would push 5C to the top, and the 5S would be well behind.
9 million is a lot of units, and stomps the 5 release. To that user I made a bet with- I was wrong! You called it correct!
I dunno. Why would someone wait in line to buy a phone that's essentially the same as the phone they could have bought at any time over the last year? Sure, they could save $100 but that's it.