Thanks Lil for getting this started. Its really been a interesting and learning read for this person.
Mr Winkler, as the forums renegade and proud owner, daring to be different, of strictly longfins, I loved the way you put it! I agree they are not Nishikigoi, and yes, the argument is a old one. But tell me, how do folks figure that they are not carp? Does not Koi & Goi both denote "carp" in definition as a overall coverage of all the species of and not as a independant? I would have thought that as independant names go Nishiki and longfin (sorry, I do not know japanese

Kudos to Lil on that score! ) would be a more refined and finished way of denoting the differences.
Perhaps it is a strange way, or advanced way, for me to look at this, but then again, as you aptly put it, it takes time and even the Doitsu had to find their place....
I like your touch of humor, you had me grinning!