I just got off the phone with a guy from the 'Executive Communications' department or whatever, basically the people you end up speaking to if you email the execs which is what a lot of us have done. He said they're so very sorry about what's happened and Tim Cook is WELL aware of the issue both in the US
and in the UK. They said they really believe people will be able to get the configuration they want over the weekend and into next week, as demand becomes a little weaker. He went on to explain that Black and Jet Black models were in particular high demand and they would be prioritising these models after launch so people can get what they want eventually. He said they appreciate the feedback and that people should be assured that the highest execs in the company are well aware of what's going on and how angry people are.
He said he was certain the system would be improved for next year - I mentioned my idea about automated reservations for IUP customers, he seemed pretty much in agreement with me but obviously said they'd work on improvements for next year. I'm pretty satisfied with that answer, he knew exactly where I was coming from and I could tell the opinions he was sharing matched mine and were very candid and I'll be eagerly trying to get a reservation in for this weekend if not sometime next week, he seemed pretty confident on that.
For what it's worth, he said the Managing Director had personally forwarded my email for follow up. I didn't ask if Tim Cook had seen it too, but I'd presume not.
Ps. It does make me feel bad for these execs though! They must wake up to hundreds of thousands of emails from customers whom they then have to forward to the exec comms team. Maybe they have different internal addresses for 'real' work emails.