Ah, the old 'I've been proven wrong but refuse to admit it so I pretend like I'm being treated poorly' routine. A classic, hell I've used it before.
Before you start slandering me, let's remember who called someone "mentally insane or extremely unintelligent" for stating an objective fact.
For your information, I am currently hold a two pound steel arming sword (well, technically it's resting on my shoulder as I type) and can swing it around with absolute easy, even though it's a fairly poorly balanced one.
Here is a source for the weight of the 1796 sabre, and
here is one for the An XI sabre.
By the way, 'pubescent' means adult.