I'm... honestly not sure. I guess I was thinking of it a little when I made my statement, although it certainly holds true for Luke whichever version of the story you want to go with. And it technically holds true for the ROTJ idea of Owen being Ben's brother... although then that probably creates the question of why Ben and Owen don't have the same dialect, although that could probably be explained by Ben running off to be a Jedi and gaining a different dialect while gone. But then again, the same idea, as has been suggested already, could have happened with Anakin.