That might become an unfortunate but inevitable result of any English-language site that's large enough, since by the numbers Americans make up a plurality (and possibly a majority) of the English-speaking world. It might be that the only counter to that is moderation and local site culture.
I can understand why it would annoy people, but it always felt like it was targeted towards Americans in the first place. Especially with Reddit being an American based company.
Holy heck, didnt realize this comment was 2 years old. Sorry for the necro!
Being one of the original commenters from way back when, I think you'll find I'm not sorry for the necro :D
I think some people will find this contentious but I always felt that Reddit's 6 month policy was pretty arbitrary. Humanity has had arguments that have been resolved and resurrected or existed perpetually repeatedly over millennia (religion and forms of government are perfect examples). In a way, perpetual posts are actually more beneficial because they can be reviewed and built on over time, allowing us to better approach something resembling truth publicly and for all to see. Plus, probably saves server space too if it reduces the rehashing of arguments.