I tend to comment on things that fit into my own personal tastes. don't take offense if I haven't commented on your track, it's just not my "thing". but it's cool that you wrote this into a thread, I think it was at least somewhat on a lot of people's minds? since it is a fairly large community I think there will be people tending to "group up".
as you touched upon in this post, there are a lot of people without comments... maybe just comment on those and start your own commenting group? I dunno this thing is gonna evolve like crazy methinks. and I am going to do my damnedest to listen to all these tracks. someone might do something I love one week then do a track that I am not very partial to another week. I am totally fine with this being the case for my tracks as well. the best part is that it is really interesting, I never know what is going to pop out of the music player!