Branndon Stewart and Corey Pullig were not busts; they were good solid quarterbacks. They had a weak receiving corps, and poor schemes. Dante Hall certainly was not a bust; he wasn't all that highly hyped to begin with.
It certainly is not unusual for a high school player not to pan out. R.C. has said it this way. About half the recruits will never play, no matter how good a class you think you have. You are recruiting 17 year olds. Boys that age mature at different times. If they are mature enough to live away from homme, if they can adjust to college work, if they can handle their personal affairs responsibly, if they go to class, if their mother, daddy, little brother, or little sister doesn't have a catastrophy back home, if they don't fall into bad company, and if they don't have a career ending injury, then they get a chance to play D1 football. Then, if they can discipline themselves to handle the conditioning program, and if they are good enough, they may beat out the guy ahead of them. Otherwise, they never play. All these off-the-field issues play as great a part as the athlete's ability, and all these things eliminate about half the recruits while they are in school. I don't know if we should call a 17 year old a "bust" for getting screened out by one of these problems. How mature were you at 17?