Do you find that your stories break into 4 through lines of 25% each? I mean, if your story is 100%, each through line gets equal attention? Or, do you find that it breaks up some other way? I was thinking that four of 25% each was expected, but then I realize that the OS has a lot more characters in it and, therefore, the OS through line will probably be much larger than the other three.
I'm curious what you've discovered in your own experience.