The reason I ask, is because a buddy at work discovered that most, if not all commercial pizza makers use some form of "fake" cheese.
Are you saying that's the case for frozen pizzas? I've definitely found that to be true but I doubt that's true of takeout places. It's actually the opposite - if you are shopping for cheese at a chain grocery store (at least in the US) you probably can't even find the same quality of cheese they use at a pizza place. All of the major brand mozzarella cheese I've seen is part-skim which is also part bubblegum.
I had the hardest time finding a good place to buy whole low-moisture mozzarella. My Costco doesn't sell it. Trader Joe's has it but it's a little more than I like to spend on cheese. What I've found and like almost as much is sliced mozzarella from Gordon Food Service. Since it's sliced you can use it on chicken parmesan, or I also like mixing oregano into ground beef and making burgers with mozzarella, pizza sauce, and pepperoni fried up like bacon. When you want to shred the cheese you can just put the slices into a mini chopper. Gordon is midwest US only but I wouldn't be surprised if other foodservice outlets are good places to buy cheese (again almost everything in a supermarket is awful)
I also really like provolone mixed in with mozzarella. Again you're going to need a mini chopper, it doesn't come shredded.