This is something to consider, as well: PC has an option to exclude from view certain forums that a member doesn't use. So even when it appears that a lot of people are online, many of them might be viewing the forums that you don't post in. If one of your threads has many views buts few posts, keep in mind that guests view the threads as well.

Many people are just shy and don't post immediately after reading a thread...don't worry, eventually it does even out. You're not the first person to notice this, either