What i was saying was the 9 ryu that comprise the Bujinkan are the original arts. Bujinkan is the combination of the 9 ryu. Not all of the 9 ryu were ninpo but the Bujinkan is just a combination of the ninpo and various arts. The 9 ryu can be traced back. Masaki Hatsumi simply gave them all one name. He will be the first to tell you the training does differ a bit from the past but it is still authentic ninjutsu. Mr. Koss didn't say there was NO ninjutsu being taught, but that there are only a handful. Here is a link to a discussion on that very Koss article (from Koryu.com) on budoseek. http://www.budoseek.net/vbulletin/showthread.php?t=4672
If you scroll down to the post with the lineage you can see the 28 sole of Kukishinden Ryű Happo Bikenjutsu ending at Hatsumi. Dale Seago also gives some what of a "reason" for some of the ryu not being listed as a koryu art. Like he said there are at least two koryu within the Bujinkan, Kukishin and Takagi Yoshin Ryu.
I did see the Discovery episode on ninjutsu. It was actually a little disappointing. Steve Hayes was at one time Hatsumi's top student. He has since gone off to teach his own style, still based very much in Bujinkan, and from what i understand is still in good standing with Hatsumi.