Then there's the usual caveat applied to any new operating system upgrade: Not uncommonly, you'll find minor glitches and bugs. It's often a good idea to wait a while to upgrade until they're stamped out.
So yes, I'm sure you want to get iOS 7 on your device right away. But if you're worried about your productivity, it's best to be prudent and wait several weeks to a month. By that time, most if not all of the issues should be resolved.