The one thing that made me chuckle regarding that link was:
Think about that, then think of all those people out there who chatter mindlessly on their cell phones, watch TV incessantly (especially daytime TV and "reality" shows), "hang out", and just can't seem to "get it together". It's frightening to be surrounded by all those stupid people
I think it would interesting if it was that stupid person that saved your life one day in the street having gained the knowledge from day time TV. Never a doctor around when you need one.
It has also been mentioned on this site that IQ tests are more geared towards N's.
To quote your site again:
And the people who make IQ tests are also people who enjoy puzzle solving, and who believe that puzzle solving is an important and valuable ability (i.e., they are passionate about puzzle solving, interpreted in a very general sense). Essentially, an IQ test measures the overlap between the passions of the test taker and the passions of the test maker.
So of course you are going to do better. Now i enjoy puzzle solving but only when i am in the mood for it. Hence the IQ of 114 depending on which test i do.