Hi all. Just got my i5/8gb model a few days ago, and I'm loving the battery life. However, as soon as I do something more demanding than say, surf safari, it significantly drops down. I'm a huge music listener, and always have music running in the background. According to MacWorld, "...iTunes will take greater advantage of the hardware acceleration provided by a Mac’s GPU, reducing the amount of power needed to watch movies and play music by as much as 35 percent." Can anyone who is running on Mavericks confirm this? Also, for users who are running Mavericks on their 2013 MBA's, how much more hours are you getting? Thanks!