Wright is a star, but he ain't 20 rounds better than Akinori Iwamura or Kevin Kouzmanoff.
He most certainly is 20 rounds better than a career minor leaguer and a mediocre Japanese bat.
Kouzmanoff went to college, and started in the minors after that. He then logged 4 years in the minors. Other players start earlier because they don't go to, or don't complete, college. Four years in the minors hardly make a guy a "career minor leaguer." By my count, even the illustrious Matt Holliday spent 6 years in the minors.
Don't simply look at age of major-league arrival to predict talent. I only make this point because I've seen this erroneous argument made against other players.