They've admitted to using a larger die size than their competitors. What else did you expect? The only consolation is being able to swap out to a more efficient PSU, and the fact that it doesn't need a host computer to run. Still, that GHs/1kUSD is nice for those of us with access to free electric.
A larger size than bASIC's 90nm, but smaller than ASICMINER's 130nm. I don't believe any other ASIC makers have disclosed their process node size.