BTW, the Sherman was also called the “Ronson” by the Germans, after the American lighter that was also popular in Europe at the time.
The slogan of the Ronson? “Always lights on the first strike.” --Oooof!
I heard and read that also quite often, BUT remember that all tanks catched fire easily when properly hit by a HOHLLADUNG (satchel load in english?) or by a other anti tank devices. if such a thing penetrates the armor, the heat inside the vehicle is deadly in most cases.
my grandfather was a TIGER I gunner (unteroffizier) and he told me that most crews from hit tanks that survived had burnings.
jens