As a rule there are 4 types of people that make up, I would guess, 98%+ of the membership in on-line forums:
1) Enthusiasts - These tend to be hobbyists, manufacturers, retailers, etc. (Think 'Reverend', 'Jokiin', Pier28' as just 3 examples in this forum, there are many more)
2) Researchers - People who research products before purchasing (I put myself in this category)
3) Avid users - People who want to gain as much knowledge about products they own and use (I'm also in this category)
4) People with problems - The majority of the remaining forum members. They have issues and are looking for help.
One group ('Group 5') you don't see are those people who have a product they bought and it works as intended 'out of the box'. They're really not 'into it' to the same degree as the first three groups and since they don't have problems they just go on with life and the forum is unaware of their existence. Because they are never heard from it leaves the impression that there is a greater incident of problems than there really is.