Just so you know, yield issue rumours were never about the cpu or gpu but the Esram. I know they work in tandem, but just thought I'd get that out there.
In fairness, I did hear from a knowledgeable first party that there were some headaches with ESRAM, but going back to my earlier posts on this, or maybe I said this in a pm to a mod, the yield issues were more concerning at one point, but that the situation improved, and they're right where they expected they would be, or something to that effect. I feel too lazy to check my post history. So, even if there were troubles with ESRAM, that didn't necessarily mean they would continue being problems.
It seems they're now in full production and whatever major concerns there may have been are probably all in the rearview mirror by now, and so, technically, when Albert says there's no production issues, he could be right, as when testing various designs and chips, it can't be all that unprecedented that some don't exactly come back as hoped, or the design seems a bit more challenging in the early goings.