I do notice an increase of FpS in Virtualized Path to Exile (Game) under parallels... it's like 10+ fps.
Overall worth it.
Same performance increase here on Path of Exile! I was very very pleased. I run mine in bootcamp full windows 7 pro though, so I saw a 30+fps increase and the ability to use full resolution instead of maybe halfway.
I used to have a few issues with wake from sleep, where the laptop would wake up with the lid closed when I plugged it in, or plugged in a thunderbolt adapter (this was all set not to wake it up). This update fixed all this as well.