Drag and Drop beats Cut and Paste in EPDM

When moving directories or files within your local SOLIDWORKS Enterprise PDM vault view, “drag and drop” rather than “cut and paste” them. If you cut and paste, Enterprise wants to bring all files to be moved to your local cache before the move begins. With drag and drop, the directories and files simply move without being brought to your cache. (Witnessed with version 2010, SP2 and older)

Nine “Engineering Data Specialist Man Points” to whoever can tell me why this is so!