Davnes007 said:

Bingowings said:

...

Luke returns to complete his training (we are lead to believe this is the first time he has seen Yoda since rushing off to 'save' his friends, therefore he has had days of training not years).

...

I was under the impression that Luke's training (and Han/Leia/3P0/Chewie's journey in the MF) had been several months long.

"Bespin...it's pretty far, but I think we can make it"
-Han Solo, TESB

I think what Bingowings is getting at, is that the major plot of ROTJ is that Luke needs to confront Vader in order to become a Jedi, that's what both Yoda and Ben tells him now. But in ESB they both warned him and insisted that he shouldn't rush off to face Vader because his training wasn't complete. When he return to Dagobah in ROTJ his training is suddenly complete because the script says so. "All other planned films are in the trash can, wrap it up guys!"

ESB - Don't rush off to face Vader, you need to finish your training first, he choose to face vader...

ROTJ - Luke: "I have returned to complete my training." Yoda: "Your training is complete, you need to face Vader."