Just a thought David, while I do agree that the total density will be lower with less exposure, that doesn't necessarily mean a change to the film curve is needed.

I think what Kodak is essentially saying is that for typical use either EI 400 or 800 there will normally be plenty of info to make virtually identical prints of typical scenes.

Yes, surely for high contrast scenes or tightly spot metered work, there very well could be impacts on the print but for most people it won't normally matter.