OK I'm backing the general sentiment of the OP. I got my Galaxy Nexus (GSM) in the UK at the turn of the year and was happy with the performance. 4.0.2 OTA ruined it! End of.
Stutters when transitioning from app drawer to widgets drawer....general lag on some apps etc, that was not there on 4.0.1. I tried rooting, and flashing 4.0.2 stock again to see if it was something wrong with my OTA update....nada.
I'm sticking with it until the next OTA as this was one phone I didn't want to root and flash a new rom every 5 seconds, but I'm a bit annoyed that 4.0.2 caused the lag it did!
Before anyone comments that they have stock 4.0.2 and have no lag.....I'm over the moon for you...but a little search will show you MANY MANY posts from people who have stock 4.0.2 and do!
Huge lag and touchscreen missing touches after 4.0.2 Ota... hoping next ota to fix these all
Sent from my Galaxy Nexus using XDA App