I've heard that curing internal myopia is a top priority for McKinsey this decade. Focus is on broadening gender/age/economic background and also broadening professional experience backgrounds.

They're hiring and developing a lot of top talent in "hard skills" (e.g., not MBA's) across different industries. From what I've been able to tell, it's paying off a lot with strategies that are grounded in reality and catching things that non-technical people would miss.

Really depends on the team you get assigned to your project though, as with any contracting/consultant situation.