That's the interesting bit
Processes are always improving, they kind of have to and there will be people employed to make it happen. But as part of that process, AMD know exactly how good each wafer is. So I would expect the best but slightly leaky silicon to become the 8350 parts, the best but less leaky parts will become the server Opterons. If they have some left over? Well if the process is getting good then they may well end up with 2 cores turned off as 6350, maybe even as 4350 parts. Some may end up as 8320, but in the back of my mind I think of the cherry picked silicon products that AMD has pumped out in the past and figured that if I could afford it I wanted a chip that had definitely aced all their testing. Mind you, I don't like to depend on overclocking to get a machine that I want, it is a bonus if I do it.