Finally the download arrived. My Nexus 7 received the OTA downloads overnight and when I disconnected it from the charger, all I needed to do was to press the agree button and the update would just begin.
10 minutes later, I was up and running. Any difference? Nothing noticeable thus far except the colour of the top status bar. Not the Nexus 4 yet. And my HTC One only got 4.3 last week. It would be some time before Kit Kat arrives there.
Let's see if anything new to discover here ....