In an academic argument, nearly everyone can consider themselves above average. "I scored in the 80% on my SAT so I know I'm above average!", "I took an online IQ test and scored over 160! Of course I'm above average!" or "In school I always made straight A's! Totally above average!"
Interestingly enough, everyone can be above average in something. Some people are more geared toward certain things than others, so really if you take that into consideration, one can be above average. Intelligence is comprised of a number of factors, though what they are escapes me at the moment, so really if you excel in one, you can claim to be above average... In theory.
It really just depends on what you think is intelligent. Someone with a high IQ can gamble away their life savings, are they still smart? Someone with a lower IQ can make a killing with smart business decisions, are they still average? Life is pretty relative.
Honestly, I don't really care. Just to be different I'll say I'm average.