I was a B/B- student from a foreign top 100 university. I don't know how I got accepted to a top 5 engineering school in the US. I accepted and ended my PhD with a 3.3. Im not very bright or hardworking.

What did I see at the university? Very hard working people. Very interesting research. Very shallow knowledge outside a narrow domain expertise.

These are the folks McKinsey hires... but these shallow thinkers are sent on 6 week projects for companies in industry they hadn't even heard before.

Once, no one in the team knew what product CompanyX sold... CompanyX is a a top tier multinational consumer product brand that routinely sponsors sports events, including TV ads.