Without a "none of the above" response I don't really see how you're going to see if this is actually accurate lol, 100% of the people who answered the poll believed themselves to be above average at something because there was no other option... 
I wouldn't say anyone is above any other. I think we all have different skills and situations in life that cause some people to excel in some areas of life. I'm pretty darn skilled with creative things, I have to be since it's my job. Does that mean I'm talented? No, it's a practiced skill. Anyone that puts their mind to it and has limbs that can hold a pen can eventually achieve what I can. I'm not special.
I was tested many times growing up and they found I have high IQ. Does this make me smarter than most? Not really. Intelligence is about much more than logical and mathematical perception, which is really the only thing IQ measures. IQ doesn't measure your ability to draw conclusions in a real scenario outside of very strict abstract contexts.
I struggle a lot with social interaction. Does this mean I can never improve? Not really, I have improved over the years. I was just set back a bit due to aspergers.
I understand this is a psychological theory but bear in mind many psychological theories have been, and need to be, challenged... because oftentimes the tests are created in a directed manner that accidentally or intentionally forces false results.
Interesting theory regardless. I guess I'm just skeptical because I have learned and read a lot about these things growing up and have an interest in psychology myself 