theres an easy way to know which forums are more active than others. each forum if you look to the right you will see numbers that represent how many views and how many posts that form has. I have found it varies from day to day, one day the depression forum will be more active other days its another one. my experience with watching the numbers each forum has been more active than another at some point through out the day, days weeks....

as for the difference between posts and views thats a part of how the website is set up. its search able by search engines and people dont have to be members to read the forums. there are lots of people around the world who do a google search and because psych central has information about both mental problems, symptoms and physical problems psych central may be one of their millions of search results google gives them. then they click on the link and read. some people dont bother registering, just keep coming to read what ever interests them or pertains to their problems.