When you are a kid, a different scale is used which compares your actual age and your intelligence age. If you have the intelligence of an average 12 year old, and you are actually 13 / 11 years old, your IQ is (12 / 13) * 100 = 92, or (12 / 11) * 100 = 109, just as an example. So if you are a fast / slow developer, you may have a higher / lower IQ as a kid. As an adult, absolute numbers are used, so an 18 year old, 25 year old and 70 year old with the same IQ number have the same intelligence.
So your intelligence should improved since you were a kid, but your IQ might have gone up or down.
And of course practice helps, alcohol, drugs, dehyrdration, certain illnesses will hurt.
However, imo IQ means f-all in reality. I ran a team of web developers with some really intelligent people but practically they had no original thought, failed to solve simple problems and couldn't apply practical knowledge in the right areas.
Can I point out that the results of this poll seem somewhat suspicious. Alright, downright BS. Also, I'm a PC user so am I skewing what you thought you were reading into this poll? Perhaps all the PC users are 130+ and the Mac users are the ones at 70? 😎 [troll: off]
128. Dunno how tho... I'm not really very smart, but I took several tests and all the results were between 115 and 130. 128 is the average of them all.