'Brightness' is so much more than some stupid IQ test can measure. I HATE IQ TESTS!!!!!!!!! They are divisive, and meaningless in measuring the overall person.
(That's my rant!)
If you're not very bright, you probably won't fit in on an Aspie forum or AFF. Most Aspies here (obviously--the evidence is all over the place) are very bright.
It is one reason I am pondering a permanent departure, and have been for quite some time. There's no use in hanging around and having no comprehension of at least 50% of the subject matter (for me, political issues and science threads.) Ever wonder why I don't participate in those!?!
Hey, don't go! 
I don't take part in the political or science threads much either, except to make a joke sometimes! And most of the music threads leave me totally baffled. But I won't say 'I'm obviously too old/female/thick to participate so I'm leaving".
You look at a well-typed post and don't see the time and effort it has taken to tidy it up for posting. If I my keyboard had no 'back/delete button' the majority of my posts would be impossible to read. 
You seem so unhappy. I wish there were some way of convincing you that you are a really good person. May I try?
There are a lot of us who would really miss you if you left.
The threads you post to are improved by your posts.
You make us think.
You stand up for people who are being bullied.
You are the brightest of us when it comes to 'cutting through the crap'!

