Sure, but from what I saw on my 2 previous cruises it surely didn't feel that way.
On our first
DCL cruise, in 2008, it was a beautiful sunny day on CC but there were barely more than 30 people on Serenity Bay all day long. We picked the 5 umbrella from the beach entrance and for the first 2 hours or so there was no one staying further up the beach except a group of people doing Yoga under a tree.
On our last visit, last september, it was a bit rainy on CC day, but the temperature was nice and by noon the sun started to come through the clouds but ours was the only cabana on SB to be used that day and even the buffet supervisor, who happened to be our head waiter on the ship, mentioned how quiet SB was on that day and how they had way too much food brought from the ship.
Also, most of the time we had the adult pool area to ourselves as well. It was really nice.
Wondering how it will be on our next cruise, in March.