Wouldn't be surprised if the bulk of the gold phones are shipped to Oriental countries, where the color is far more popular and sought after with much greater earnest (bordering on social imperative).
Purely anecdotally, a ton of the people in my line wanted gold, but only the first ten people actually got one. It seems plenty popular here too.
It will be interesting if we ever get a color breakdown to see if this "gold is for Asian countries" thing actually holds up, or if it's just another instance of bizarre cultural misunderstanding.