The Firepower Kings: The Americans

[Kuokkanen]

Could the American advantage in firepower be more down to better tactical communications or supply chains? What I mean to ask here is, were U.S formations actually heavier in Arty tubes than say German or even other allied? Or, is this simply a logistics advantage? i.e more / better ammo supply?

Coordination, accuracy and short delay CAN be better than larger number of bigger cannons, proves Finnish Defense Force against Red Army [:D]