Who I have the same questioned this topic

Why would VZW choose you to say hey, we will show them, lets screw up their device, they will upgrade? There are many who have posted their device works great. Mine included. And remember, most who do not have issues will not post that all is well.

It can be an app that ICS does not play well with. I suggest to all with issues to place your device in SAFE MODE, if it improves, there is an app issue

Sent from my iPad