I used to know more about computers, due to the number of computer courses I took in middle school. However, I was in 8th grade in 2001, so I'm a bit outdated. I probably will say that I know more than the average person when it comes to computers, but I could definitely know more. I feel competent enough to build my own computer if that tells you anything about my techie level.
I pretty much only know about computers though. Other things... not so much.