It would be nice to find out whose these were. In postwar interrogations, one of the SS upper ech stated that one of his superiors (it's been a while since I perused enough of the book to know I didn't want to read more) that Polish Jews were the "genetic powerhouse" of European Jewry, and that, with the exception of those liberated from the camps, every Polish Jewish individual had been killed.
In Geddy’s book he said that in most Polish villages, 90 to 95% of them were killed before even getting on the trains. His mom’s village it was “only” something like 25% of them were killed straight-away.
He thought it might have been due to the fact that her village had several factories that were useful to the NAZI’s, and they needed the Jews to work them. (His mom was 14 or something and worked in the local steel mill at first).