agree with the both of you... Considering that Luke is the son of a "Once Possible Massiah" I would think Luke should have been more powerful than Vader, considering the condition of Vader. But with the training that Luke received in the little time that he had, it's hard not to think that Luke is somewhat weaker, even though, IMO, the movie shows that Luke seems to have the upper hand, it's hard to believe he could be so skilled at the point of ROJ.