I think the most insightful, and to me the most meaningful, comment was Greene's about Murray. When a player knows where he stands and exactly what he needs to improve on can go a long way. I think it's also important to note that the young players on the team, which is almost all of them, are most likely to absorb any information from the coach just to stick with the team. I think it goes a long ways.
Also when you compare Murray's defensive system to that of Crawford's run and gun it rings all the more true. So much of this game is defensive that when you bring in a coach that lacks a strong structure it's very easy for young players to slip in that part of the game.
There's a reason teams coached by Terry Murray have only missed the playoffs twice.