I will start by saying I agree with all of your post except the part boldfaced above. It is very easy to calculate how many miles per year you drive and figure out the difference in fuel mileage. So it may be quicker than he thinks. Although if he only drives 5000 miles per year, the difference would only be 113 gallons of gas. A total savings of about $400 dollars. I do agree better for the environment, etc, etc. But at the normal 12000 miles per year, it will only make about $900 difference. Some would say the fact that he prefers the G35 to the Prius has a cost associated with it. Might be worth $900 a year not to look like a dork!!