Children are taught to wield knives made for adults at a young age even today. A twelve year old has learned to use a kitchen knife long before they are that age.
I've been cooking since I was 8 years old- I
GUARANTEE you that the grip I have on my Hinkels now is FAR superior to the one I had 30 years ago.
Take two european two-handed swords, one from germany and the other from england. Will they both have the exact same dimensions. Will a fighter from either country suffer a -2 penalty because the blade isn't balanced for his nationality?
Their dimensions probably would differ- Germans favored the flamberge design for a long time- and its possible that the swordsmen would suffer difficulties with the varied designs.
However, you're still talking about 2 weapons that, in D&D terms, would be identical AND made to the scale of their wielders.
A better comparison would occur if someone could post the dimensions of a German zweihander and then calculate the changes (to its various physical dimensions, mass, blade cross section, etc.) if it were shrunk in all dimensions down to the size of a longsword...then compared THAT to a typical German longsword.
But I don't do that kind of math.
Re: Storyteller's response to H-Smurf's post:
No it wouldn't, if it's expected to withstand impact from a creature of near equivalent power.
They block the same attacks that deliver the same impact. The requirements will also be the same.
I'm with H-Smurf. The key isn't what its impact its expected to withstand (more a measure of armor than a weapon, anyway), its what kind of energy the wielder will be expected to exert while wielding it for a given amount of time. A smaller wielder will demand a less-massive weapon. He will have different leverege.
A greatsword isn't just a longer longsword- its proportions and features are different. A typical 2hander will have a longer hilt, as well as a MUCH larger ricasso...possibly even quillions above the ricasso-which longswords generally lack. Its blade will probably have a thicker cross-section- many were made with a single-diamond cross-section.