[mpotter]

We haven't considered making it non-linear. It's an interesting suggestion, though I'd hesitate to go that way only because the user then lacks a clear 1:1 model of how the slider directly affects their rating (without explanation). We haven't received enough ratings yet to prove your assumption. When we do and if it does hold true, our assumption now is that we have _enough_ of a scale to expose meaningful differences.

You've given us good food for thought, thanks. My general feeling now is that I think it's important to leave the negative portion of the slider intact (however less it's used) to maintain a solid mental model. Might be something to test down the road though.