It's extra large capacity for a Maytag, but not by other machines' standards.
It's like the story of the man who bought a yacht and wanted to take his family on an outing in it. He was wearing the hat of a ship's captain. His mother stopped him on the dock and asked, "Sammy, by you you're a captain and by me you're a captain, but tell me, Sammy, by a captain are you a captain?"
It was this "extra large capacity" gimick that helped drive Maytag out of business. Instead of developing a true extra large capacity machine to match what Whirlpool, GE and others were offering, they deepened their tub to hold 18 to 19 gallons instead of the 16 gallons their standard tub held. When they really needed to offer something larger, they put the Maytag name on an old design from Norge. That, along with the Hardwick stoves , Admiral refrigerators and other products they bought cheap because the products were based on old designs that needed redesigning and were built in old factories that needed modernizing was the short sightedness that brought an old company down. Maytag could claim the deep tub was extra large capacity, but once people saw the difference in what size load the Maytag could handle and what size load other extra capacity machines could handle, Maytag's lie was exposed. I am in no way saying that helical drive Maytags were not good, dependable washers, but I am saying that Maytag did not design a genuine extra large capacity washer.