Talking to my coach who played in the minors and other people who i know who played in college and minor leauges, and one who made it to the show, it kinda goes like this.
Best of HS: Ace pitchers and #3 and four hitters go to college.
Best of College: Number 3-5 or six hitters get drafted, maybe two or three pitchers
Best of A ball: #3 hitters and good starters and releif pitchers
and so on, basically the next level you play at only consists of the best of the level previous, it only gets harder as it goes up, and it never stops getting harder till you get to the show, and when your there, your the best.