There are so many big arguments against sprawl and post-war suburban-ism that it's hard to know where to begin.
The author focuses on commute times, but really there is more to life than how fast you can drive to a given destination.
Do we want our city to be an endless sea of parking and highways? Don't we want to live in places that are worth caring about and that we enjoy being in?
When I see the downtown skyline or the CN tower, I feel pride in the city I care about. When I walk through Kensington Market on and see various bands/rappers performing on the street, tons of people around, great food, it's a place worth being in.
When you're in a giant parking lot next to a highway with big-box power-centre stores around, there is no sense of place. It's just like every other power-centre with the same restaurants & stores (Kelsey's, Chapters). Driving on a wide highway is soulless & boring.
Next, there is the issue of the cost of energy. Last century there was oil literally spouting out all over America in Texas, California. Now we have to buy from the Mid East, do off-shore drilling or try to use tar-sands or the arctic. Easily accessible fossil fuels are being used up, and wait until the developing world keeps buying even more cars. Long term, the price of gas is going to keep increasing continuously. Even if we all switch to fully electric cars, much of the world's electricity is generated by using fossil fuels. I believe that Toronto will be thankful in the future that we have Niagara Falls to generate a huge amount of electricity and a transit system that runs on electricity. How attractive will post-war suburban sprawl be when the price of gas gets higher and higher?
Lastly, obesity is a huge problem in our society. Much research has shown that walking at least 20-30 minutes a day has huge health benefits, and that those who walk and take transit are less obese than those who drive for everything. If you spend all your time driving for chores & commuting, you have less time to exercise. If you walk to the transit station, walk or bike to work or for groceries, then you are guaranteed a certain amount of exercise built in to your day.