I had a different experience. I phoned Apple and told them exactly what the problem was and how it needed to be resolved. It was a hardware problem but the guy told me to do the usual (permissions, nvram, pram, etc). After I told him I'd done that he said I had to take to a repair place, the nearest was an hour away and only open when I was at work. So I tried to ignore it, then when I was in London I took it to the genius bar. The genius was as clueless as the other guy.
It was a well documented problem, and they said they had never experienced anything like it before. I called AppleCare again and told them they have to pick it up, guy spoke to his supervisor and agreed. 3 weeks later I had it back and it was fixed, so I'm not all that bitter.
I know the people in the Apple call center are only doing what the screen is telling them to do, but it frustrates me when you have to go round the houses to get the support you need, and have paid for.