I might add that recently, Lucas has developed a tendency to end any desciptions of film concepts with "or is it?", or something to that effect. He's basically undermining anyone's ability to use his quotes as hard facts - not surprising considering how many of his earlier quotes can easily be made to contradict themselves.
Looks like he's just throwing everything up in the air at this point - this is not surprising, considering how little regard he had for continuity between the trilogies.