Just what do scouting reports tell you? There are projections within the reports that are also predictions. In most instances, the predictions have a certain degree of proven validity with the top 27 major league prospects. They may not reach the lofty standards predicted or may also actually exceed them. Sometimes the promise is never attained due to injury or just fail.
The Red Sox through the years have had the unfortunate failures as has every organization. Occasionally a player such as Will Middlebrooks would burst on the MLB scene and high hopes became the standard.