There is no site out there where the majority of its members are smarter than another sites. Unless it's like a forum for medical sciences or some ****.
reddit prob
even tho it's full of neckbeard white boys that couldn't play Halo cause of their over bearing christian mothers who think their smart cause they study rhetoric
It's hard to say. Facebook has the largest sample size so the average IQ there would be closest to the average IQ in general. The only one that doesn't for sure is ****ing 4chan