OK, color me skeptical. I'm sure it works in certain circumstances but not in others. Another factor not discussed is that pitchers have to be able to pitch to the proper spot in relation to the shift - the old pitch them away, play them away, etc. If you don't hit your spots, the shift just puts people out of position. Baseball has been played for a very long time and while we have greater raw data now, its really the professional sport that has changed the least over time. The current obsession with strikeouts is another example. I think we all agree that it is very handy to have a pitcher with the ability to strike someone out with a man on third and one out. I'm pretty sure Connie Mack, et al were smart enough to figure this out as well. There are many parts to the success equation, whether it is pitching or defense.