somebody else can probably give you a more complete answer, but I think superposter might relate to rate ie nbr of posts per day. I think I was averaging over 10, like maybe 14 for a while there. some of it was games, they can go pretty fast! but sometimes you can get a quick little convo going. anyway, belated welcome!

eta: that's one of the reasons I stick to mobile access - I can't see any 'measurements' so I don't freak out!