The one and only true canon was and still should be the oot, but Lucas himself did not follow the continuity or the canon when he created the special editions and prequels. So anything the man says about canon i call bullshit since he did not even follow it himself.
He had to change the originals to fit his conception of the prequels which is retarded they should have been made to conform to what was already established.
Plus he adds EU stuff to the movies he did not create, but does not matter to me since the prequels and special editions are an alternate universe version like bizzaro world star wars, they too are EU or are infinities. Just not the better EU.
That this newer star wars stuff does not jive with the originals tells me it is entirely false and not set in the canon star wars universe which existed up until a certain point in the 1990's when the dude decided to act as though he was making star wars for the first time in 1997 , its pure insanity.
The novelizations and the first two radio dramas were once G-canon. You know that in the return of the jedi novelization Kenobi talks about being owen lars brother, which was canon until lucas decided it was not in 2002 but it had been canon from 1983 til 2002. He just gets to change things when ever it suits him, the prequels have such big continuity holes with the originals it is not like swiss cheese, the hole is big enough to fly a death star through.