I knew most of the stuff they reveal, but didn't know about the secret ingredient thing.
Alton Brown likens the american version to a sporting event, while the original iron chef is more like a "Godzilla movie" in terms of its theatrics compared to the American version. He describes an episode of IC: Japan where a guy nails a live eels head to a board and skins the thing alive. Wow, and you say you like the American version better?!