It's true. Despite what I'm sure is a corporate goal, not all Subways are created equal. I'd imagine what separates the good from the bad would be ownership and/or management (like nearly every business on the planet). This Subway certainly seems to treat the employees right as this location is always busy and quick to get you through the line.
I have another Subway location closer to work but this is my preferred location. They have nice though limited outdoor seating area (that could use a little more attention since the birds seem to be plentiful in the area) and the inside is always clean and a little larger than what most Subways seem to have.
I hear they have an assortment of sandwiches to choose from but its been years since I had anything but my favorite: Footlong meatball with extra pepperoni, (not toasted, of course) pepper jack cheese, lettuce, tomato, onions, JALAPEÑOS! And a sprinkling of Parmesan cheese. Grabs some chips, a large tea and head outside to enjoy the wonderful Phoenix weather!