Earlier quoted context omitted.
They literally hire the people with the best grades and test scores from the top universities. Idk how much better you can get than that.
It's well considered by a lot of people in the industry that a prospective's grades and even which school they went to aren't a good predictor of skill.
FWIW, the most effective colleagues I've worked with all scored really high on standardized tests. They're a great predictor imo