No. I call it the way I see it. I'm betting the iPhone 5c's slow sales are because the colors are ugly, not even because it is plastic (a LOT of Android devices are plastic and sell just fine...but they do not have ugly pastel colors and are slippery as soap?). The iphone 5s is nice looking, if staid.
This is not 'cycles of popularity'-- I'd expect it to SELL if it was tied into cultural cycles -- this is Jony Ive's fashion sense, who is aping the current visual design community who are guided by FASHION. Fashions do not have to be popular---it just requires a small group of people to look down their noses at the unwashed masses and tell them they suck. A lot of people hate iOS7's colors and aren't thrilled with the colors of the iPhone 5c, so you can hardly say this was driven by popularity or market forces. It is FASHION solely, with the same immutable logic of do not wear white after labor day: arbitrary and meaningless.
The colorful iMacs sold well; the colorful iPod Mini sold well. Very different color palette, which obviously Jony feels is "old" and no longer fashionable.
As to gold, that is your preference, which is fine. I have more problem with the retro-mod look of white on the front. Apple had just one color with a black front---not a whole lot of choice on the iPhone 5s.