Deadliest Warrior is very entertaining, but after doing a little net research, I've learned that the show — or rather, Geiger and Desmoulin — take a lot of liberties and leave a LOT out.
The "ninja team" apparently are not schooled in ninjutsu, let alone "masters," and a lot of ninja weaponry was ignored. The so-called final battle was a joke, too. Of course, all the people rooting for the Spartan were happy because they all complained about the outcomes of the first two shows, claiming the producers were "biased against" the White Man.
So far, the episode I like best is Viking vs. Samurai. The guy who demonstrated most of the samurai weapons, Brett Chan, apparently isn't a charlatan like the ninja guys.