Interesting stuff. I think it changes with age. If I had taken that test in my 30's, even after having had several very different successful jobs, I would have scored much higher than I just did now.... 39.
Turning 50 also gives you a lot of perspective on things. I now know and can accept that I've worked hard to gain all the engineering knowledge that other people/companies want and need.
Still... sometimes when I'm giving a design review talk in front of a bunch of PHD physicists... it's odd to realize that they are hanging on my every word and respect/believe what I'm saying.
But isn't the other side of this conceit? Is someone who scores 20 a conceited basturd?