bollocks. Yank soldiers, Brit Soldiers, Canadian Soldiers, I've played with 'em all. They know when to shoot a sumbitch in the face, and they know when to hand out a candy bar. All this crap is just that: crap. Any trained soldier knows when to ramp up and when to scale down. ANY trained soldier.
It's not like it's brain surgery: put bandages on those who need them, and put bullets in those who need them.