I understand the relationship differences between superiors and customers. Nor do I necessarily think this E-mail was "Rude." But it lacks decorum. Which To break it down for you (Not trying to insult you), was distasteful in the least. Perhaps the poster who sent the E-mail didn't view it as "Rude", but fails to see the ignorance through there demeanor exhibited in words, when in reality, perhaps They would have addressed this differently if they had contact with Cook in person. That's why I don't consider this E-mail rude, as it was dry and subjective.
E-mail or not, paying customer or not, there is a certain degree of respect when one naturally addresses someone of a level as Cook is. It's almost as if a reasonable person would do this with out thinking about it, because it's subconscious behavior.
Although, I want a pair of these as well and I do understand the plethora of frustration on these threads.
What should the email contain? Seriously asking. A please? The customer is trying to pay an insane amount for earbuds, and is waiting on a promise that should've been fulfilled already and for which there is absolutely no expected resolution date. He resorted to the last opportunity, which is to contact the office of the CEO. He had to be as direct as possible to get his message across. There was no insult, no harsh words. Just an expectation. He actually even complimented the CEO by saying that he agrees with his idea that the future is in wireless headphones.