I don't want to get into a huge debate about sword fighting here. I agree with you that it's hard to critique without knowing the context. For all we know, this dude is a demi-God who could hold his sword like
the dude in Force Unleashed if he wanted to. And some people like a bit of Hollywood in their game. Actually, I don't think I've ever seen a very realistic approach to third person sword fighting in games.
But just to flaunt what little I do know, the styles and techniques used in competitions such as the one I gave links to (Swordfish) are typically based on old, historical manuals, dating back to the late medieval age. That's not just because they like to play Robin Hood vs William Wallace, it's because the stuff from those manuals actually works. But the debate of whether or not techniques used by medieval duellists represents what was actually used on the battlefield has been inconclusive, I believe.
Anyway, sorry for derailing the thread if this information wasn't useful.