I think they meant it as a acronym potentially? But the "big 4" are typically to refer to the accounting firms. "big 3" are for management consulting? Bain, Bo

I think they meant it as a acronym potentially? But the "big 4" are typically to refer to the accounting firms. "big 3" are for management consulting? Bain, Boston, and mckinsey? Or does deloitte fit in there? Anyway neither here nor there.