From a less talented writer, what I have written usually takes a couple of weeks to a month (and who is to say if the story actually is any good?). Usually, in my mind I have the sotry worked out and know how I want it to flow, it's getting it to read on paper the same way the "fantasy" plays out in my mind. I, however, am not as disciplined as I should be when it comes to writing. I can go days or even a couple of weeks between starting to write the story and finishing it.
Primetime has indicated in a previous post that he pretty much sets aside a couple of hours a day for his writing. I wish I could do that.
Bottom line is, even if the story isn't great (and even if I don't post a reply), I enjoy reading what thoughts (true events or fantasies) are floating around people's heads.