From a different point of view.. I had my surgery on Sept 5th (Fri), and returned to work on the following Monday. Still a little sore, but I have a desk job, so I just had to make sure I got up a walked around 30-45 minutes. As far as telling your boss, no you do not have to tell anyone you are having it done. I work in a small environment, and I have yet to tell anyone here that I had it done.
To add to the mix, one week post op, and I was preparing for hurricane Ike. Which had me doing a little more than what I had expected to be doing at that point, but I was more than physically capable of doing the needed preparations.
Everyone is different, but I just wanted to let you know that yes it can be done.