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