You threw in the edit just as I hit the reply button. Two things to keep in mind is that time estimates aren't perfect, particularly for huge transfers. As far as the transfer itself goes, unless you had both systems connected directly to each other via ethernet cable, it's possible for your intermediate (the router/switch) to be a bottleneck. By way of an obvious example, both systems could have gigabit ethernet support, but if your router only supports 100 megabits, well...