Yummy… I love to eat Nestle Kit Kat. Still waiting for Android 4.4 KitKat OTA Update for your Nexus 7 (both 2012 and 2013 models)? Wait no more and install the OTA update (KRT16O) manually now. Yup, enjoy the actual Kit Kat and Android 4.4 KitKat. However, you need to have some technical skills – about sideloading. Else just wait for your turn to get it. You should be getting it in this week or next. There is OTA Update for Nexus 10 as well. But Nexus 4 still missing in action.
Nexus 7 (2012 & 2013) Android 4.4 KitKat
Download Android 4.4 KitKat OTA Update