Threads posted in TravelBuzz are likely to garner answers from more people, but also to have a shorter lifespan: -> good for a quick answer to a simple question
Threads posted in a specific forum usually get more detailed answers, many from experienced FT'ers on weekends, and are more often bumped up at a later date: -> good for trip-planning and the FT 'databank'
The standard of moderation in TravelBuzz is certainly not the same as in MileBuzz, and does not need to be. However, gently weaning some of the newer posters to the specific forums would not hurt either.
The problem is that some of the smaller forums have not reached critical mass, and will not unless jump-started (by an influx of redirected posts).