Sony promised to release Android 4.2.2 updates for the Xperia Z and Xperia ZL soon after their launch. And even though the Xperia ZL hit the shelves a few weeks later than the Xperia Z, it is the first one to taste the latest 4.2.2 version of Jelly Bean.
Currently the Android 4.2.2 update is available for the Sony Xperia ZL C6503 (LTE) model across Europe. You can have it both through Sony PC Companion and over-the-air. We expect the other Xperia ZL flavors and more countries to join the roll out in the next couple of weeks.
Since Sony Xperia ZL and Xperia Z are practically identical, save for the different shells, we guess the update for the water-proof Xperia Z should be just around the corner.