Well, the short answer is yes.
Pearl does advocate letting a child cry. But it is not for the same reason as Ezzo. Ezzo believes that crying is good for a child because it helps them regulate a schedule which provides consistency and routine for the mom. :/ Pearl advocates crying as training that they are not the most important member of the family. As far as I can tell, Pearl isn't big into crying in order to go to sleep - just crying so they can learn to wait.