It seems like Power Nap doesn't work with my MBA 2013 (when the power cable is plugged in), because I noticed it doesn't check for new mails and takes maybe a second to reconnect to the wifi network. I read that it is necessary for the 2012 MBA to install a SMC Update, but haven't found anything for the 2013 version. Or is it just because i turned the option on that the OS asks for a password when coming back from sleep? What is your experience? Thanks.