I recently purchased the late 2013 15, rmbp w/2.3 16GB and 512. I noticed that my sleep image is only taking up 8GB of SDD space. In the past it was my understanding that the sleep image matched your onboard RAM gb for gb thus with 16GB of onboard ram I would have thought my sleep image would be clocking in at 16GB. Did Apple change something with Mavericks. BTW the wakeup response time on this machine is wicked fast. Curious your thoughts?