Teams rushing their star prospects?

[Libid21]

I often see teams rushing their stud prospects through the minors to bring them up in the majors. Is there a way to make it more realistic by making the computer realistically give them a good amount of AB's or IP's in the minors before bringing them up onto a certain level? I know there are some exceptions in real life, but for some reason the Braves rush Heyward and Freeman into the majors in the first year as soon as possible. Many, many prospects I've noticed are rushed. Any help would be appreciated. Thanks!