If you do notice that you loose data connectivity, you don't have to reboot. Toggle Airplane Mode for 15 seconds or so. That seems to reset the data connection with the tower. If toggling Airplane Mode doesn't reset the data, run the Activate app. It will exit with an error at the end if you're already activated, but it seems to reset data connectivity as well. Before the TWS bugfix, I had to reboot to reset the data connection or use the Activate app. Now, after the bugfix, just toggling Airplane Mode resets the connection every time I've tried it.
As I said, I had multiple data drops before the fix, but it does still happen every once in a while even now, maybe once every other day or so for me. And if there's an app that's actively trying to poll for data and the 3G data connection is stuck, it will drain the battery pretty fast.