It's been almost a week since Apple released iOS 5.1.1 but not everyone seems to have heard about it right away. Some may not have received or noticed the popup notification or badge on the Settings app to advise them it was available. Others may have been waiting to see what, if anything, iOS 5.1.1. did to battery life and performance before updating. Still others aren't updating until a nicely packaged, unthethered jailbreak is available for iOS 5.1.1.
If you're in the first two groups, however, our latest reader survey shows that iOS 5.1.1. is about the same, if not a little better, when it comes to battery life and performance, so you can go ahead and update without any worries. If you still haven't received your update alert, or you missed it, or simply haven't gotten around to it yet, it's really easy, and really fast, to manually start the updating process using iCloud.