meh. Just some thing I've been following for oh...10 years or so.

Doesn't seem to matter with all CPUs, but AMD outs two PCBs currently that I know of, one marked witth a "T", and one marked with an "N".
Does it really matter? To normal people, no.
To those that search for the "golden egg" chips out in the wild for extreme clocking, minute differences in CPU manufacturing, including dates and such things, can seem to be important.
If AMD is smart, I personally believe they stand to benefit from opening up informationally a bit about their binning process, or even salting certain "batches" as needed.
Alas, I'd like to partake in discussion of the topic at hand, but cannot, so there ya go.