Mckinsey and 'consulting' companies like this have the best hustle going on on the planet. Get some b-schoolers, collect some stats, put them into Power Point and state the obvious. Collect large check. Rinse, lather, repeat.
No. I am too young to know any McKinsey consultants personally. (As a rule they hold MBAs and I am only an undergraduate.) Although, many of my friends from back home seem to be eying the prize.
I am peripherally familiar because my father has done business with them and has told me a little about it. I do not know enough to evaluate the quality of their work (that hardly matters anyway). I can only speak to the ridiculous magnitude of their compensation.