It is so fast and convenient to exit at this airport! Directions are clear, lines are short, and Toronto Canadians sure know how to make you feel welcome! When you get to the line there is a person pointing where to go and machines that allow you to self-scan and print a receipt that you then bring to a Canadian border security official. The Canadian border security official looks at the receipt and your passport and then sends you to the exit to pick up your luggage.
I've been through a lot of international airports and this is by far the most expedited and friendly immigration process of any airport I've seen. Everything is made clear in the directions and therefore there is less confusion amongst travelers. Needless to say I was very impressed by my experience here.