OzoneSherrif said:

I wonder why in the ESB duel Vader remarks "impressive, most impressive" when all Luke did was a simple force jump. seriously that was impressive? what about all the commonplace force powers the Jedi flaunted all the time as depicted in the prequels? not a big deal.

of course building your own light saber will get you a "INDEED you are powerful as the emperor has foreseen" out of Vader too.

vader saying you are indeed powerful had nothing to do with luke building his lightsaber. when luke was saying come with me etc..etc luke was using the force on vader. all you have to do is watch the scene. vader felt lukes strength.