It's also idiotic because there are so many variations, and people can change. There are C players who have the talent to become B players in 6 months, and A pl

It's also idiotic because there are so many variations, and people can change. There are C players who have the talent to become B players in 6 months, and A players after 5 years, and B players worth having because of their other abilities (management potential, mentoring). There are also A players who will flame out, or become discouraged upon meeting the wrong challenge. Humanity does not divide so neatly.