I'm guessing the answer is zero. Cases involving the RIAA might be a different matter but it's unlikely that there would be any blanket assumption of that sort

I'm guessing the answer is zero. Cases involving the RIAA might be a different matter but it's unlikely that there would be any blanket assumption of that sort for any file sharing case. The thing to remember here is what people, particularly people in the law, are paid to do and what they believe are very different things. It's possible, even likely, that she has no strong opinions on file sharing one way or the other, that she was just doing a job and that she's entirely capable of taking a clear and unbiased view of things.