That's interesting considering the name that the brown bee came to be by (the stinging flies) to native americans. And apparently retained that quality until their loss here in the states. Must have been many changes to the bees along the way in breeding. The russians I have had and have are some of the gentlest bees I've seen. Not doubting what you've found and that it can't be done. Just interesting.
Did you hang onto the link where you found the information?
"Success is not final, failure is not fatal: it is the courage to continue that counts." Winston Churchill