I always stop posting when whatever software/product has been released. Then i come back when there's an upcoming change. 
YES. Back in the day after the 3GS launch, I remember there was a guy here who'd obsess over individual pixels not lining up (seriously...I think it was how various components of individual letters lined up and how aesthetically unpleasing it was, or some such nonsense.) He went on and on and on and on and on and ON endlessly about it and after several YAGEs, I think he finally left. Craziness. I'll probably also take a bit of a break after launch, but not for too long because I'll be awaiting a jailbreak (no matter how long it takes).
I can say that my 3GS had some horrible stuck pixels. On a black screen it looked like some glitter, or dust (or both) had been sprinkled on the screen. It actually took three different units for me to finally get a good one. This was something I easily noticed (and so did the Apple employee) without reading about it frist though.
Every single time a new Apple product comes out, there are a whole bunch of people that examine it with a microscope and find flaws. Which ends up ruining the device for me because I start to notice them. This time around, I will stop attending the forums for a while, just to give people the chance to get over the 'yellow tints' and 'LED bleed' and get on with their lives.
I made the mistake of going on here when I first got my iPad 3, and I noticed something I would have NEVER seem myself. Sorta ruined it for me. Don't want that to happen again.
While this community is truly awesome, is anyone else annoyed by how OCD everyone seems to be?
People look for imperfections because they are dropping a crap ton of cash, be it up front or via monthly contracts, for their devices. I am personally grateful that forums like this exist. If my device isn't pristine, it's going back. Apple is really good about this too. Point out to them the flaw and they will make things right. Apple ALLOWS their users to expect this of them. One of the ways Apple is justifiably considered "better than the rest"
I understand people want functioning devices considering the money they spend but, if you don't notice a potential flaw on your own, is it really an issue?