I think the only people that read these sites are the ones that do the research or are generally interested in such sites, articles, reviews, etc. The people that read these sites usually know what a bus, pci-express, (computer hardware vocab), as well as the "new, hip" thing to have where new technologies come out. It's a nerdtastic place to be and I think that new people who do venture this site and don't know what new tech is out there would be so lost that they wouldn't even know where to begin.
That being said, if people did have an interest and found such sites, then hopefully they know how to search and have started building computers or learning where to start on building a computer.