@The UPS Man,
There are more ways to measure intelligence than IQ, since there are other TYPES of intelligence that an IQ test doesn't measure.
And, this is corroborated in the brain. Brain scans, I have read, of London cab drivers have a very complex development in the part of the brain used for spatial reasoning, since London has unique streets that are encyclopedic to remember. That too is a type of intelligence that IQ tests do not measure.
Your analysis of races does not seem to include the fact that a person of average IQ could be superior to a person of under-average IQ for whatever IQ measures. So, your concerns about which race has the smartest members might be short sighted, since we interact with individuals, and I am just concerned whether the person I might be interacting with has average intelligence, or has below average intelligence, since one needs to talk so another person understands us. No use using words of Latin derivation when another person only knows the meaning of words that come from the vulgate.
So, be wary of speaking to the English, since the average Englishman has a command of English often beyond the command of the average American. One is judged, by how one speaks. Forget IQ. If one cannot speak well, one should not embarrass oneself by making references to IQ, in my opinion.
By the way, IQ just measures how precocious one is, since the mathematics that arrives at an IQ score just shows how advanced a young person is from the AVERAGE IQ score (100) of his/her age group. Meaning, for example, an IQ of 140 would just mean for a ten year old that he/she can think like the AVERAGE 14 year old. Now all 14 year olds are not geniuses; however, to think like the average 14 year old, if one is only ten years old, the child seems quite intelligent.