mehetabelo: At the moment no. It is on the story list page for the author which is already accessed, so it isn't hard to get.
In fact, adding the following to the adapter at about line 195 will do it:
Code:
score = lc2.findNext('th', {'class' : 'num'}).text
if score != '-':
self.story.setMetadata('score', score)
And "score_label:Score" needs to be added to the ini file in the storiesonline.net section.
Maybe the score should be converted to a number.
And maybe something other than "score" should be used. That's what the site uses, but, there might be a more common term used in FFDL. Though I couldn't find one.