It is more heavily weighted towards discussion than posts. However, just last week we shifted the algorithm a bit more towards posting, because we felt it was too lopsided, so that might speed things up for you. There are some other factors too, but currently nothing that slows the rate. I am sure that the rate will have to be adjusted as activity and usership grows. That said, although the # of followers plays a role, the effect isn't linear.
Currently the only input is time and user appreciation. That could change. If you subscribe primarily to tags, posts could eventually give you a bad experience like you suggest (ignoring some users could help, but eventually it will be a losing battle). A tag is a shared space on Hubski. However, if your content mainly comes by following quality people, you can easily filter your content by the selection of who you follow. I strongly suggest that you follow more people than tags. (It looks like you do). Defnitely unfollow anyone sharing content you don't want. As for comments, that is a shared space. We have some plans for how we will keep comments from being averaged out by the 'wisdon of the masses'. Some functionality regarding that will roll out soon.If popularity of posts/comments/people determine visibility of content, I strongly believe that this site will, one day, rapidly lose quality in content as low effort content that many people find agreeable and familiar, similar to what has happened on reddit.