wide margin".
Yes, if...
You forgot to mention oil, of which they have plenty.
Yep, but my impression was that this is not limited to newsgroups. Its usually not direct, but its the "we're the best" attitude you always sense down there somewhere. We sense this and it bothers us.
Sometimes they infiltrate slim and later start inflating beyond recognition :)
Your friends are mostly engineers so this is a bad example. It has been in the papers a few years ago that about 90% of Americans never leave the US. Can't find the source at this point, though.
It is my belief that anyone traveling to at least a couple different places gets a much better understanding of other cultures and sees things in a better perspective.
S