Cheese first then sauce is also practiced in Chicago. One of the downsides to this assembly method is that if the cheese is applied very last, it covers everything, good for holding everything together, but if you tend to be a little heavy handed with the vegetable toppings, the cheese will trap a lot of the moisture under it, thus making for a softer finshed crust. This isn't too bad with a deep-dish type of pizza, but it can be a real bummer on a thin crust unless you are in Chicago where no one expects a thin crust pizza to have a crispy bottom anyways.
Tom Lehmann/The Dough Doctor