Another 'quality' story
Almost up to the standard of the "exploding iPhone epidemic" you were hyping a while back, which turned out to be almost entirely hearsay. Yes, there have been some reports of problems with iMacs. Is it disproportionate to the numbers sold? Is the damage/failure rate uncharacteristic for any mass-produced product line? This is a machine that is being sold in huge numbers and has to be shipped with more caution than most (edge to edge glass is more susceptible to damage after all).
As far as I can tell, the delays are simply due to its popularity - Apple can't keep up with demand. I've bought one myself recently, and it has been flawless to date - one of the best computers I've owned (and I've had many).