Cains forces seem to have lost less than 10 men for each enemy starship destroyed. Which will be met with similar levels of disbelief.
I'd guess this was recorded. I'd love to see the Imperial reaction to this space "battle".
"The news from our spies among those rebels just came. Their fleet has taken ten to one losses in a fight against pirate's fleet."
"Ten to one? I am surprised they even had so many ships to win a fight with such losses."
"Not ten to one ships, ten men per one destroyed pirate warship."
"Now that's just sad. When making up such numbers, our information department at least tries to be believable. No one will believe a bunch of chaos cultists defeated an entire pirate armada and lost less than a hundred men. Not when the biggest ship they had was some Rogue Trader that got stranded there."
"That's chaos worshipers for you, they will believe the most outrageous lies."