dooku was sith, he got the title darth tyranus, but the EU magically came up with the diffenece between sith and dark jedi after TPM came out to explain all the other baddies that they had written about like lumiya etc. hence how dooku gets lots of dark jedi cronies in the clone wars. buts that EU stuff, that is cool, but shouldnt be mixed with the films.

i can imagine a lucasfilm apologetic may try to say that they meant to turn luke to the dark side and not to sith or something like that. the thing i hate about the prequels and any added backstory to anything, is how it stops things seeming real, i would love to go back in time and tell GL to write all 6 in 1977 so it would seem like it was actually intended. would there be anyway of working the term "sith" into the speech or into any point of the ROTJ do you think? i like the idea of referencing padme in the great "your mother" debate.

just a thought, if "vader" is dutch for "father", would that make luke, darth "zoon", ie dutch for son?