If there was any BS, then it was from Boeing!
Whether ba operated 767-200ERs or 767-300ERs is nihil ad rem. The point is that they struggle to operate from a 10000 ft balanced field in ISA / still air conditions at MTOW.
Interesting. Wiki claims the source of their data is Boeing, and according to wiki, the "Takeoff distance at MTOW (sea level, ISA)" is 8,300 ft for both the -200ER and the -300ER.