After successfully publishing my theory on the fact that the duel is not "short"(http://blogs.starwars.com/saberb/1, a theory that is accepted by fans), I come back with a theory about the duel's ending, that illiterate fans criticize saying:"Vader can't fight for ####, he can't hold a ####### saber".
Totally wrong. Two theories:

Theory 1; The duel was too long (http://blogs.starwars.com/saberb/1). Somebody had to do the mistake!

Theory 2: Luke used a powerful Force ability known as "Dark Rage", where the user attacks with full force, but also spends all his Force energy (gets exhausted). If you play Jedi Academy (great game), you definitely know the ability I am talking about. This is why Luke was so sweaty while locking Vader with his green blade. This also shows Vader's great power (he lasted for around a minute even after a 5 minutes long fight with the user (Luke), while in the game, a "Reborn" Dark Jedi lasts for...5 seconds.

Both theories work well, I think....
I added Theory 2 on Wookieepedia and got blocked, cause I didn't know the speculating on duels is not allowed. That's not gonna happen here!

Agree? Disagree? Express yourself-post a comment!

Other entries for this duel:
http://blogs.starwars.com/saberb/1
http://blogs.starwars.com/saberb/4

Thanx for reading!