Nope, two adults, two kids, showers, dishwasher, washing machine.Still, even when I was back at my parents with 5 adults there, they were saving with a meter. You really have to be using a lot of water to pay more on a meter.
If you're all taking baths every day, watering the garden, hosing down a fleet of cars etc. then you'll probably be worse off but it's rare for most people with normal household usage to be worse off.
As for subsidy, water companies aren't government subsidised.