I think there's rather less to that new method than the hype suggests...
[dsctm.cnr.it]

Basically they're assuming something about the degradation of material using X-ray scans (which aren't really used for that kind of thing.) This would assume that they've got other samples of this kind of material that can be reliably dated and that were stored under the same conditions.

I'm going to guess "no" for that second part and "possibly no" for the first part.

-- Byrd
Moderator, Hall of Ma'at