This cannot be more inaccurate.Noone can predict a players growth,ability or more important,the decicion making process.Every kid grows and matures at different rates.The problem with starting a database on a kid at a early age risks the biggest downfall of all players,Labeling is the biggest attempt by scouts to get a jump on kids talents.However if you receive a bad lable and you grow and become better well,that lable sticks in baseball and you can never change it.Thats why marketing kids at an early stage can be a mistake.Also many showcases employ wannabe baseball enthusiast with very little knowledge on how to recognize and rate a player.These people can again provide misinformation about your player and create a lable.