Yeah, your probably right to try to get more information before drawing to many inferences. What are the chances of a Polish officer exaggerating results in a Polish vs British contest? Pretty darn good.
The details of the scenarios would have to be known too. Personally I think the scenario, objective, time constraints, etc are the most cruical factor in deciding who wins and looses. Did the T-boats need to pick up speed in order to cover the op area in a certain amount of time? Was the Kilo free to sit, or did it have to reach any coordinates?
What if it was the other way around? With T-boats hiding and the Kilo hunting them? What if it was a scenario where T-boats needed to penetrate a barrier and launch strikes and the Kilo needed to protect the area? Would it still be 4-0, or would it be 0-4? What's the definition of "a kill"?
Its darn hard to find anyone willing to talk about the details... and probably illegal for them to do so... If you find anything let us know