Yes, apparently store exit polls are indicating that the lines are mostly for buying the top-of-the-line iPhone 5S, not the 5C.
You bring up an interesting comparison, which is confused this year by hiding the old model in a new plastic case, and by the lack of presales for the 5S.
For example, last year, the iPhone 5 got two million presales in a day. Those presales were NOT counted in the first weekend sales figures, because they haven't been delivered yet.
Apple is smart. By not having a presale this year, they got people to line up and buy from the stores, which means more sales that can be announced right away, instead of being a not-delivered-yet count purgatory.