I can't understand this from the 'Common Misconceptions' link:

"but probably 1/3 of those are not native speakers of English, as English-speaking countries are predominantly immigration countries. So only about 30% of all Westerners are in fact native English speakers. The European Union alone has 20 official languages, and dozens more non-officials ones and dialects."

Care to state your source? I'm from one of those "immigration" countries and I'd say it was quite rare to meet someone whose mother-tongue wasn't English. For your information, I've taken the following from wikipedia:

http://en.wikipedia.org/wiki/Demogra...untry_of_Birth

76.9% Australian born, 23.1% foreign born.
The most commonly declared foreign countries of birth amongst respondents were:
United Kingdom : 1,036,253 (5.8%)
New Zealand : 355,765 (2.0%)

So all the Australian born people are naturally native English speakers. Plus all the New Zealand and UK people. That amounts to over 82%. So it might be fare to say that around 18% of all foreign-born Australians come from non-English speaking countries. Dare I say countries like America, New Zealand and Canada might be the same.