Yes, I have noticed the ratio. TC has 945 members, so how many of those are still active? In the archives I have seen several of the old usernames that are no longer on here. If there are 945 members, how come its nearly always the same motley crew that pop up on here? Just an observation.
You tend to find that a lot on forums, a few that I'm on tend to have a core collective of frequent posters. Then around them you have the people that drop in once in a while and read more than they post up. Some people actually don't feel confident in signing up and posting belive it or not...
Those lurkers may be future carlton owners, i lurked for a while as i looked for a GSi before i got the barge

I too was a lurker for a while after I got my barge! Glad I signed up...