Without a doubt it's true that Apple's support services fail on many levels. When corporations lose sight of innovation and mainly focus energy on profits these things are inevitable. I've dealt with many such issues and can relate to the frustrations you have experienced. I personally try and solve every such problem myself; an absolute last resort would be having to get 'help' from someone else before expiring all other possibilities.
As far as your screen issues are concerned, It's quite common – and not specific to your particular display. I have a Cinema Display which does the exact same thing, and I've basically become immune to really noticing it much anymore. When I first became aware of it I tried just about everything to resolve the 'problem'. I was able to find a way to clear ghosting almost completely, and it's as simple as running a particular screensaver for the extended periods of time you're not using your system. The name of it is "LCD Scrub", and although I was skeptical it really does work. It doesn't get rid of the ghosting instantly, so you have to leave it running quite a while before you see any results. Good luck!
As far as your screen issues are concerned, It's quite common – and not specific to your particular display. I have a Cinema Display which does the exact same thing, and I've basically become immune to really noticing it much anymore. When I first became aware of it I tried just about everything to resolve the 'problem'. I was able to find a way to clear ghosting almost completely, and it's as simple as running a particular screensaver for the extended periods of time you're not using your system. The name of it is "LCD Scrub", and although I was skeptical it really does work. It doesn't get rid of the ghosting instantly, so you have to leave it running quite a while before you see any results. Good luck!