I'm on the Summit now (4 night Miami, Key West, Nassau) and on Saturday, our Sea Day, the bars were open. They were also closed, but no bar single bar will be open 24 hours. Bars have hours of operation, just like the restaurants.
Aside from maybe using hyperbole for the bar situation, I read the review as legitimate. I can see how certain beverages would not be available or in short supply, and then they run out.
Its been a great trip and I'm bummed we're on our way back to Miami.