I think this is a pretty typical pattern actually. I participate off and on (and when "on" I post fairly frequently) over at the WCI forum, and you usually do see MUCH higher read numbers than posts for ALL the reasons you mentioned. A lot of folks just "lurk" and soak it all in, and often won't respond either because they don't feel qualified to answer, don't have anything to add, as Tom suggests aren't comfortable with the tool, or . . . just plain don't want to. :-)
I am signed up on the following:
WCI's forum
Carving Mag's forum
Knotholes (Yahoo group)
Woodcarving discussion list (Yahoo group)
Woodcarver mailing list
Stick Carving World Wide (Yahoo group)
and probably a few others that I've forgotten about. ;-)
Of ALL of these by FAR the best and most valuable to me as a relatively new carver because it is the MOST active - is the WCI forum. Why? Because (in order of importance):
1. it's the most active with a WEALTH of knowlegable participants
2. it's the most open to long dialogue's and discussions (and even some disagreements as long as things don't get heated)
3. it's easy to use and navigate and most importantly - it's easy to post pics within the Forum so you don't have to jump between a gallery and a discussion if you want to illustrate a point. This to me is probably the biggest reason it has taken off. Carving is a VISUAL media and to clearly discuss and share ideas it REALLY helps to post pics right in the posting.
So that's my take on this.
ChuckT
PS: Tom H - LOVE your little 5 minute wizard article in the new WCI. Nice job!! Can't wait to try some.