There is no evidence, at all, to support it. None. Nada. Zip.
WW2, especially in the East, was studied by myself as an under and post grad' under an excellent professor.
Considering a trip to Kursk and Stalingrad in summer 2015 if I can get away with it.
It's the bomber war, waged by the RAF as opposed to the USAAF, that intrigues me at the moment and Normandy between June - August 1944.