It might only be three days of play, but my saved game says 12 hours. Cripes.
So I finished off Episode VI. The first three missions were really long, but the final couple were really short – a fight with the Emporer, and a Millenium Falcon strike on the new Death Star. And after that? It was complete!
However, there’s more to collect and stuff. So I went back to Episode IV, Chapter 1, and completed it in Free Play with Darth Vader and Boba Fett. Ace.