jvallrugo, McKinsey, Bain and BCG are extremely exclusive. They focus primarily on elite universities like the Ivy League, Chicago, Duke, MIT, Michigan, Northwestern, Stanford etc… Basically, top 15 universities. Ross is considered one of the top 5 or 6 MBA programs for placement in Management Consulting firms (top 3 among undergraduate programs).
Here’s a list of the companies that recruit at Michigan’s CoE.
http://career.engin.umich.edu/wp-content/uploads/sites/30/2014/01/companylist.pdf
I think the current CEO of BCG is a Wolverine (Engineering no less!)