I installed the latest OSX update and I’ve been using it for a couple hours now. I have to say that at the very least Safari seems to render noticeably faster. Aside from that it seems as though some tasks use slightly less CPU (I’m a MenuMeters addict). Also I was having a really annoying time with finder where I would be in list mode, grab a file, and drag it down (or up) to a folder that wasn’t currently on the screen and nothing would happen. Now my window is scrolling up to the folder I am looking for. I had a weird feeling this was just something on my Mac.. but either way it is gone now.