When we first opened up Fast Break Pizza, we cut our pizzas in squares to be different because the other other pizza places in Crestwood cut theirs like a pie. After a few months of every other call asking if we could pie cut it instead, we stopped fighting it and started pie cutting all of our pizzas.
Now we get a few regulars who request it cut into squares
But at least it is one every 100, and not every other customer.
The only other thing I can add is that at one time we had an 18" pizza and really the only way to effectively slice that thing is to cut it into squares. If the pizza shops in the area made substantially topped pizzas, cutting it into squares is about the only way you can manage a slice. I'm not sure if an 18" pizza is normal for any of the Southern Indiana shops or not.
-Scott