The statistics are in need of closer examination. Since frum Jews (almost) never live together without being married, whereas other Americans (non-frum Jews and non-Jews) often do, the comparative divorce rate also has to take into account the rate of permanent “living together” relationships ending. Also, since for all purposes there are no Orthodox “gays” (adopting such a lifestyle requires one to leave the frum community), whereas such lifestyles, and relationships are common among non-frum Jews and non-Jews, one needs to make a statistical adjustment.
A more useful statistic should focus on families that include minor children.