Robocopy is the best tool to move data between NTFS filesystems but was never very quick. Windows Vista, Windows Server 2008, and later versions include a new version of Robocopy with performance tweaks including multi-threading that speed things up dramatically.
Windows 7 Is Here! In My Hands! But Why 8 DVDs?
Microsoft just let loose a Release Candidate for Windows 7, the operating system that will bring peace, love, and joy to PC users everywhere and finally stop folks from switching to Macs instead of using Vista. Maybe.