Are the improvements in Mavericks snake oil or real? I myself find it really hard to quantify the improvements. I seem to be getting the same battery life. I get about 5-7 hours on ML and Mavericks. Swap usage seems to be the same. Smoothness of scrolling is definitely the same. Since I am also experiencing more beach balls and bugs, I am more inclined to say that its snake oil and that its highly subjective.