The simple explanation is that AM is far behind in technology with their current models. 130nm is comparable to a Pentium III and when the competitors are researching i7 chips, it's only a matter of time before you can't give away the blades that AM currently produces.
If you have learned anything from the ASIC story so far is that the bird in your hand is worth two in the bush. Old technology usually has the advantage of having larger error margins and a lower production cost. Moving into better technology is certainly important, but don't underestimate the opportunity cost, if a better technology means you're not spending money on hash power growth.
So yes, AM should sell everything including the kitchen sink while they still can. Two months from now,.... those existing blades will be worth less than their packaging material because anyone can jump across the street at get far superior performance at a tentatively much lower price (120GH/s for just north of $2K anyone?).
Don't know if you're an optimist or a pessimist. At least you're extreme.