VaDad, There is a wide variability and a large population of players available for the draft. If you are talking players in the first 5-8 rounds, most scouts had best do their homework. But maybe two illustrations show the variability.
In our area there is a top lefty pitcher who signed early with a Pac 10 school. In a recent article, one scout said he could go in the first three rounds and a a second scout said he had never heard of the player. In my son's experience, the scout who signed him saw him play at least 10 times, spent numerous practices watching him and talked with him for hours. Also had the national crosschecker for a visit. On draft day, a scout he had briefly talked with the previous year called him to say his team would take him next round. While he was on that call, his draft selection was announced. The baseball draft is nothing like football or basketball. They select over 1500 players in less time than football selects about 200 players. They are picking high school, JC and college players. You would like to think the values TR speaks to will be an integral part of the process but I think the process itself clearly indicates the wide variability from team to team and scout to scout.