But with SMB 2.1 and the new version of Robocopy, full multithreaded operation is supported and we should therefore see better performance in these scenarios. So where does that leave those of us who ...

We've set up a new SAN device and are moving our user data to this device, generally one user at a time. We always have used Robocopy to preserve all the ACLs of the files and folders being moved, but ...