Like father, like son, right?
But anyway, i don't see Luke as "real" jedi in movies coz he got so little training. And yes, Darth Vader was holding back, but even then Luke got somewhat advantage on Vader coz of series of strong suprise attacks. Goal was to turn Luke to Dark Side.
In final fight Luke goes into hiding, then Vader starts with taunts... how would you feel if someone is threatning you with family? His reaction was completlly natural...
And also, Luke was raised on farm as normal kid, full of emotions. Remember when Yoda said to Obi-Wan how Luke is too old for jedi training? If he started training at the age of 5-ish, like they normally do, he wouldn't be so full of emotions... i think