Keep in mind that the "grade level" that these programs churn out is based on two things. First of all the size of the words you use (my guess is science fiction just generally uses larger words than other forms of writing...seems to make sense) and how long your sentences run.
Incidentally, newspapers (last time I checked, anway) aim to keep their writing at a grade 4 level or lower...that's considered the reading level of the average north american. My personal belief is it's a case of "use it or lose it". Let's face it, everyone here can probably read well beyond the grade 7/8 level, but then we no doubt all read a lot more than the average population!
Keith
