If this is correct, then I still say you don't need it.
Who cares if it takes 2 seconds to rez a pet or 4 seconds? If your pet is dead, you should be in a safe area before you rez them, or else they will likely get whacked again as soon as you rez them.
I cannot speak for the original poster, but I think he was asking if dex affects bandage time while vetting.