Indeed those are huge companies and they probably have more skilled people than the average, but I seriously doubt they have most of the best programmers. Simpl

Indeed those are huge companies and they probably have more skilled people than the average, but I seriously doubt they have most of the best programmers. Simply the amount of people working there is too small to cover even 1% of the best programmers in the world. And there are plenty of skilled programmers working in places where those huge companies do not have even an office, and there are plenty of programmers not considering working there for various reasons.