@Gordo, I am not even sure how common short black or long black coffee is in the USA, I know that jugs of brewed coffee is common (shudder), however I would have thought that there would be a bigger espresso and cafe culture.
@Lukas, I don't want to derail your topic thread...
I don't have experience with all of the different profile generation packages on the market, however it would seem that a popular approach is to use a "simple" slider/black % generation selector... which sets the amount of GCR. There are also separate K start + K max (for setting short or long black plates) and of course total ink values. It would appear that neutrals and colour areas are treated the same without separate UCR controls that perform "GCR" in only neutrals.
Stephen Marsh