I've never heard of "Robo Copy", so I have no idea what it is.

Have you tried it yourself?  If so, was there any difference in speed?

Did the Server Admins give you a reason why they wanted to use "Robo Copy"?  Is it because of a perceived efficiency?  Some other tasks already use "Robo Copy" as well?   The reason I ask is, why change it if it's working.  If your task is I/O bound (which I'm sure it is, with a 3MB file), there shouldn't be a significant difference in transfer time.

Update:  ++McDarren on the great analogy!  It so nicely painted for me a picture of the "Server Admins", defending their point because they all own BMW's, but haven't necessarily ever driven a Mercedes... ;-)

Update2:  I see that I haven't ++'d McDarren yet, just made a mental note to do it, so that really should have been McDarren++ above...