Just an observation, but has anyone else noticed that if a story starts slow, the scores typically don't pick up much (i.e. the initial scores tend to limit the future scores)?
My reasoning is (and this is all hypothetical), that the initial lower scores result in fewer people picking the story up, so there are fewer readers to vote the story up in the later chapters.
In my current story, the scores are my lowest, yet I've been receiving rave responses to the story, so it's a bit confusing. Since I typically write stories that start slowly (someone discovers something, and it takes a while to figure out what's going on), I've found that the initial score remains largely static, but that once the story finishes, the score drops further (as those not impressed enough to read it initially tackle it--resulting in lower scores--but that the scores (for a decent story) will gradually improve over time.
But it reemphasises the old advice, it's best to start a story off with a bang (someone gets killed, abducted or chased) rather than a whimper (someone stumbles upon a mystery, notices something odd about a neighbor, travels to a new city only to ...).
This seems to affect FS scores more than SOL, due to the lower number of visitors (there aren't as many readers over the years to make up for the initial lower scores). Hence I wonder what the effect will be on scifistories.