Nutshells: The new standard of conciseness?
When people tell you something "in a nutshell," they're telling you the simplest, most concise version of the story that they can.
Of course, no one mentions the type of nut they're using. One would assume that smaller nuts mean a more concise statement. Therefore, a walnut is less concise than a peanut, which in turn is less concise than a pistachio.
If there's anything I love more than nuts, it's the metric system, so I'm using the "in-a-nutshell" principle to define a new unit of concision: the walnut. One walnut is the amount of concision needed to fit a story in a typical size walnut shell. I imagine the centiwalnut or the milliwalnut would be good baseline units for taking measurements of just how concise your story should be. (I imagine a reasonably compact story would be about 700 milliwalnuts.) The actual mathematics of converting story length to shell-filling volume, however, is still in development. Until that gets finished, you can use the walnut-peanut-pistachio continuum to give a rougher estimate of how to-the-point a story should be.