I'm at 53 MB used of 1 GB total swap after three days of uptime, while on 10.8 I would go far over that within minutes of startup (usually topping out at ~10 GB

I'm at 53 MB used of 1 GB total swap after three days of uptime, while on 10.8 I would go far over that within minutes of startup (usually topping out at ~10 GB total after a day or two), so something does appear to have changed.