out of the three here's what i found last evening.
plant 1 had some tip burn on the top and on some new growth. pulled dead dry stuff off.
plant 2, minor tip burn on the cola, some baby fan leaves dead. pulled very little off.
plant 3, severe burn on the entire crown. pinched off two top nodes and some other dead dry stuff.
basically, it was like some vine ripe sample material.
there was new growth on all three of the freeze victims so they will recover.
moral of the story: watering before you cover in a hard freeze makes a big difference.
.