I did see a reference to Goleman as I looked into this further. Though not the book, similar philosophy.
SJ - I don't believe it is used as a benchmark for IQ. What I gleaned from it quickly was that some people with a lessor IQ are more successful than those with a higher IQ. It has more to do with how one is adaptable to the emotions of others and themselves. To be able to keep emotions from interfering with rational decisions. Or having the ability to make things work for you by adjusting to others and taking advantage of their (or your) personality in social or business settings.
The brightest people are not always the best in other words.
I'm guessing now...