So I decided to mail Steve Jobs directly on the issue asking for assurance that the issue was being looked into.
Somebody who is not Steve Jobs mailed me back to say the issue would be better discussed by phone, and that I should speak specifically to them. I'm hoping that they will not be a regular customer service advisor treating my case as a single problematic unit, and instead indicative of a wider quality control issue that needs to be addressed urgently.
We shall see.
UpdateThey called, and did not appear to be a regular customer service advisor. Turns out Steve Jobs read my mail, and forwarded it on to one of his teams with a comment that they should look into the complaint. While he couldn't comment on the issue specifically, he assured me that Apple are now aware of the growing discontent over the white balance and are investigating. This is good news, and hopefully it will be addressed in due course.