Dude, there are other factors that I'll consider more important than their tribe.
1. Their family's net worth.
2. The high school they attended
If there's is a high level of creativity in their tribe, then I'll lean towards the idea of creativity boosting cultural practices than genes.
In Nigeria for instance, the Hausa aren't known for their intelligence, and have a reputation for being plain dumb but very violent especially for religious causes (Islam).
The Yorubas are known for being bookworms - they have the highest rates of schooling in the country. And are quite political.
The igbos are known for their entrepreneurship prowress. They tend not to value schooling and are blunt with their words. They claim to have a jewish ancestory.
Someone who's not familiar with their history would claim these differences to be genetic. However, some historical accidents and cultural and religious differences are key.
The igbos have the highest rate of apprenticeship in the country. And they embody the phrase, "Money talks bullshit walks" to a fault. This explains their business acumen. Their language doesn't have honorifics unlike the yorubas.
The seas brought Europeans to the southern part of the country where the Yorubas dwell and for a long while, the capital of the country was located there too. Hence the value for schooling and politics.
Add Islamic schools, very hot weather - and a religion of marrying many wives at an early age and you get the Hausas. They make up the majority of the army as being a soldier is about the only path to a better life.
Conclusion, you'd need to study the history and culture of the Ahskenazi before claiming a genetic predisposition to creativity.
They've done quite a number of studies like that, including studies on identical twins adopted by different parents, which gives you matching DNA.
The reason scientists aren't saying such things, is because it's pretty clearly wrong.
Heres a wikipedia page on it:
40 - 54 - Severely challenged
55 - 69 - Challenged (2.3% of test takers)
70 - 84 - Below average
85 - 114 - Average (68% of test takers)
115 - 129 - Above average
130 - 144 - Gifted (2.3% of test takers)
145 - 159 - Genius (Less than 1% of test takers)
160 - 175 - Extraordinary genius
http://www.free-iqtest.net/iq-score-guide.asp
From the wikipedia article, Ashkenazi Jews have an average IQs - a few points higher than American, Hongkong national average.
You can't judge evidence based on a popularity contest.
Scientists, like every members of society, are bound by social rules. Some taboo cannot be broken, and when they are its a career ending move. It’s easier to get founding by inventing 126 genders that don’t exist than saying a few obvious truths, that are backed by science.
