I agree, which is why I suggested 'creeping hypoxia' due to failure to pressurise successfully. I do however find it difficult to understand how at least one of the pilots wouldn't have managed to get some oxygen, even in a partially hypoxic state but as I posted earlier, hypoxia affects perception before it affects consciousness and to put the mask on you need to be aware that you need the mask in the first place.
Yes... but! The ECAM will throw it right into your face when your cabin altitude is excessive (but still way below critical altitudes) - it is not as subtle as it was on the 737 in the Helios case...
I hope it is a genuine accident, I really to hope for the sake of all of us and our industry... but I have a gut feeling it could have been foul play...