a bit odd question.....

Cryo'ing doesn't really change the molecular (crystalline) structure if the metal. It just causes them to pack more tightly, thus making better electrical contact.

Burn-in has a lot to do with "settling" the interface between the conductor(s) and the dielectric material. So I'm not sure how cryo would affect that. I would say a qualified "yes" but probably not as much as when the cable was new.

pleezeus, if I understand you correctly, you are saying the metal must shrink after cryoing. You're probably right, though I expect it wouldn't be a whole lot since metals are not known for their porosity. But an interesting point nevertheless -- I never really thought about it.

All the descriptions I've read about the cryo process basically say the same thing: which is that cryoing eliminates/reduces the spaces in the crystalline structure of metals. I'm not sure what effect (if any) the process has on non-metallic substances.