Lower Hands at Address

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For the past eight months or so I have been practicing with a standard setup where my right forearm is in line with the shaft at address, and in my backswng, I try to trace the plane line with the shaft. In contrast, however, I see so many professionals who have their hands much lower at address, creating more of an angle between the shaft and the right forearm (elbow plane setup?). Questions: Is there any advantage to having lower hands at address? Does tracing the plane line when your right forearm is not in line with the shaft at setup differ at all from tracing it when your right forearm is aligned with the shaft at address? I anticipate that, if one starts with lower hands, one has to make a plane shift up to the turned shoulder plane. Will that make any difference in how I visualize tracing the plane line?