My commute is about 45 minutes each way 5 days/week. I also spend maybe an hour or so a week maintaining my bike (some weeks more than others). Driving takes maybe 20 minutes so I spend and extra 50 mnutes or so a day commuting. I shower at work, but do not include that in my commute time, because I would shower at home if I did not commute.
That said, commuting by bike saves me time. Before I rode every day I would frequently go to the gym in the morning for 45 minutes or so and then drive to work. Commuting lets me get to work at the same time I workout.
Paul