Yes, it's what they're saying. They quote $377/mo as the maximum affordable rent for a minimum wage earner.
There are many counties across America where a low-end two bedroom can be found for substantially less than that $377. These claims only make sense if they refer to median prices.
The claim 'there is not one U.S. state, metropolitan area, or county in which a minimum wage worker who clocks 40 hours a week can afford a two-bedroom apartment' is simply incorrect.