I hang my head in shame, despite it coming across as total BS, it does appear to have been added on the 18th.
Still, I don't think it's rocket science to come up with a story like that. It seemed logical to me that once we discovered there was encryption on the buses, and the fact that part of the HDD is keyed to the unique ID, it's completely logical to say that there is at least 1 unique ID used for 'locking' devices to the 360, which is logically going to happen just after the virgin hardware has been filled with the latest kernel and its unique ID after manufacturing. From that point only 'special tools' will allow the encryption to be switched off. The sorts of tools required will exist, but what you need to look at is the fact they existed also for the original XBOX, and how many of them leaked out? I don't think MS let anyone except themselves have controlled access to these kind of support tools / systems. And they aren't going to leak out.
Does anyone remember the equivelant tools leaking from MS for the original XBOX? I mean, to diagnose / reflash the TSOP / unlock / lock HDD etc?