Apple's Delayed iMac: Demand or Defect?

Although NPD claims delays are the product of outsized demand and not defects, first-hand retailer reports of defects make the issue seem muddier than NPD (or likely Apple) would have us believe. Having myself been bitten by a faulty board on a G5 iMac, I'm perfectly willing to believe the new iMac has some parts with an unexpectedly high fail rate.

On the other hand, my i7 iMac rocks the casbah.