I notice that almost everyone you listed is a single guy with LOTS of time to post on CathInfo.
There plenty of married people who don't have nearly as much time to post -- they post occasionally.
Actually, as I type this there are 13 members online (not counting the 35 lurkers). So it's just some of the "long standing members" who might be away at the moment.
Another thing, Raoul -- you are more one-of-a-kind than you think. Not just in a "God made you special" sense either.
How many people can post like you, Gladius, or myself? Not many. Out of 1500 people, approximately 3 :)
Why do I single those 3 people out? From what I can tell, they are well-educated (at least in matters of the Faith), interested in helping spread the truth, etc. but they *also* have a way with words and are good teachers. (Glory be to God). There are plenty of intellectuals, but to be a good teacher is a different, unrelated skill.
I'm sure we can find examples of priests as well. They all learn the same material (assuming they went to the same seminary) but some of them give excellent, riveting sermons and others don't. The ones who don't aren't "bad" -- they just don't have the same gifts.
At the seminary I attended, Bishop Williamson stood out as the best educator. He made it look easy. He was able to get knowledge out of his head and into our heads -- that's the skill of teaching.