TOEFL/IELTS для иностранцев

Американцы TOEFL не сдают. TOEFL - это Test of English as a Foreign Language.
What is the TOEFL® test?
The TOEFL® test measures the ability of non-native English speakers to use and understand the English language as it is heard, spoken, read and written in the university classroom.
http://www.ets.org/toefl/ibt/faq

Все эти тесты предназначены только для таких иностранцев, как вы.
Почитайте тут, интересно :http://www.spoken-english.ru/2011/02/04/kak-ocenivaetsya-ielts/

на кой американцам тоефл? какая то каша у вас в голове

Что касается IELTS:

Can a native English speaker take the IELTS exam ?

Yes, a candidate who speaks English as the primary language can sit for the IELTS exam. There is no restriction imposed on that.

If you are a native English speaker and studied your previous degrees from institutions where English was used as part of the academic practice, you can be exempted to supply the IETLS score to the intended university/ college or in immigration offices. Contact to the university or college you are going to get admitted or contact to the immigration office to be sure if you need this test to prove your English skill or not.

Does the IELTS test differ in various parts of the world?

IELTS is a global standard test. It does not assess candidates from different geographical location differently. However the questions may vary depending on the test locations or centers. But the IELTS authority strictly maintains the standard and questions format in all location. You are likely to get a different question set for a different geographic location but the standard of the questions, test and evaluation would be same.

There are some misconceptions that certain test centers' exams are easy compared to others, a native examiner would be hard to convince in speaking exam ...etc. But don't bother about these misconceptions and strictly focus on your exam preparation.

Насчет TOEFL:

Allyson Norton, spokesperson for the TOEFL programme at Educational Testing Service (ETS):
The test does not vary by country; all TOEFL iBT tests have had approximately the same level of difficulty.

Американцы, австралийцы и англичане не сдают TOEFL. Надеюсь это поможет Вам разобраться!