Culture eats strategy for breakfast, as the saying goes. When you have a group who buys into the same mission and lives the same values, they are a hard group to match. That's what make the MBB so powerful. Not only do they boast scale and expertise, but they have buy-in across the board. That was one finding from the Vault Consulting50 survey, where Bain and BCG rank among the Top 3 -- and McKinsey made the Top 12. The top performer, The Keystone Group, is a repeat #1 from last year. One big difference from last year: Clearview Healthcare Partners climbed from 8th to 3rd in this measure.