Unless it specifically states that is has never been frozen, it is impossible to tell. The likelihood is that it has been frozen at some point. But, the fact that the name is cryo-vac should offer some reassurance, that the meat inside an intact cryovac or similar bag will be fine.
I'm feeling bearish, and I'm packing a Wusthof Grand Brisket slicer from MABA
"perhaps...but then again...maybe not..."