Agreed feels smoother than 4.2.1 before upgraded to 4.2.2 I would encounter lag anytime there is any WiFi data transmission, eg... when downloading and installing an application, when updating or syncing an application, thing use to lag till WiFi was done transmitting and doing whatever it was doing. It seems fine now on 4.2.2
It actually seemed a lot slower than 4.2.1 at first, but, after a few reboots, the butter is back. I didn't notice that I lost root until I rebooted a few times, so that could've been the cause of the lag, as apps were probably looking for su in the background.
Sent from my Nexus 7 using Tapatalk HD
Current Devices: Nexus 7, WiFi Xoom, HTC One
Retired/Sold: G1, Vibrant, G2, G2x, Galaxy Nexus
I'm yet to install it but here's the changelog from wiki:
Fixed Bluetooth audio streaming bugs
Long-pressing the Wi-Fi and Bluetooth icons in Quick Settings now toggles the on/off state
New download notifications, which now shows the percentage and an estimated time remaining for your app downloads while they are happening
New sounds for wireless charging and low battery.
Removed option to show all calls in the phone app's call list.
New Gallery app animation allows faster loading.
USB Debug whitelist
Bug fixes and performance enhancements
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