The problem is that Apple was very vague at pre-order time on whether or not the new iMac was VESA Compatible.
So the first batch of buyers didn't know it wasn't compatible, and probably assumed it was since previous 27" iMacs were. I did, until it came to light that the stand didn't come off.
I realize this isn't the end of the world, but it is yet another example, of either a) Apple screwing people, or b) Apple not having their act together on a product launch, or c) All of the Above.