From what I understand, the amount of Hugo votes this year was way more than they were expecting (I think I read "record-breaking" somewhere, but am too tired and/or lazy to find the link). And yet it's interesting that there weren't enough votes for fifth short story (due to the 5% thing). I don't know if that speaks to the diversity and richness of the field, but wow, kind of a bummer that despite there being so many good stories out there, there's only four stories in that category.