I would disagree. I think 210.50(c) says that the outlet that is installed for the specific laundry appliance must be located within 6 ft of the space allocated for the appliance. I don't see either 210.50 or 210.52 preventing additional outlets on the same laundry circuit within the laundry area. Actually 210.52(f) seems to allow additional outlets. And I don't think they are assuming 2 washing machines.
