How did McKinsey surge to the top? They excelled in Quality of Life and Work metrics, leading the Big 3 in 12 categories, headlined by highest scores in career progress measures like client interaction, internal mobility, promotion policy, and exit opportunities. Bain earned highest marks in 5 categories, with Bain leading the pack in culture and training. In addition, BCG performed best in four categories, with selectivity and work-life balance, in particular, earning plaudits from employees.