Very important point. :iagree:
Actually no one can tell for sure (depends on the manufacturing of the disc, glues used etc..), but I don't think you'll have issues if you allow the discs get back to room temperature for at least 24 hours before burning them and you don't try to speed up the process by putting them in a too warm area: great/fast changes in temp is known to lead to slight warping, condensation etc...
The faster the change, the more risks to possibly damage the physical properties of the disc.
As for the low temperature itself, if you're worried about that, you should be worried with any media you buy: think that many of them may have been stored in such conditions for weeks!
']If short term cold affected burn quality or lifespan in some way, well then alot of people are in trouble. I would guess that the vast majority media, at some point down the distribution chain, has been in the hands of a courier. In the winter, courier trucks get pretty darn cold.