This chip is pure binning. Intel's doubtlessly stockpiling the choicest chips for this new grade. What's puzzling is why they're sitting on them for so long. Likely reason is that the volumes of chips at this bin just aren't there, as well as the fact that a significant number of these top chips are being made into Xeon X5690s.

I'd be willing to bet that date codes on the eventual retail chips will show most of the CPUs were made many months before launch day.