PC - HD transfer

How fast/slow is it to transfer files via LAN from a PC to a HD connected to the WD TV Live? I just did some tests with a USB flash drive connected to the media player, and it was slow as **bleep**. How fast is it compared to a transfer from PC to a WD Media Live (100mb/s) via network? Thanks.

I have a 1TB SATA drive (Seagate) in a USB docking station that is connected to the WD TV live. When I transfer files from the PC to that drive via LAN (cable), I get 60MB/s. I use a 100mb/s router.