[Rick V]

Updating modules is often done automatically when the factory diagnostic computer is hooked up.
If you have a running issue or a stubborn CEL that is the first thing that gets done since updates often address a lot of these kinds of issues. Your personal computer gets updates, your car is the same issue.
You were also told the time frame is one hour but did they tell you that hour would start at time X?
They should have offered you a loaner since through no fault of your own you are down a car, I would mention that little nugget to Nissan, not the dealer.
I find most dealer bashing seems to come from folks who have never made a living from the other side of the shop doors and don't have a total idea of the restraints placed upon the folks doing the work by the manufacturers. The dealer really has nothing to do with the shops and sales depts. everybody likes to bash on.