Similar to wkwk, I get about 9-10Mbytes/sec with a gigabit NIC in my PC to the player through a gigabit switch. I’m using Cat-5e cables @around 100’. Shorter gigabit runs work error free without using Cat-6 so you might want to upgrade your switches and NICs before pulling the cable. Fishing cable can be a pain. As a note, Cat 5 (no e) doesn’t fly well at all for gigabit connections as it’s way below spec.
In comparison, transfers from my PC to a DLink DNS-323 NAS I have are around 25Mbytes/sec. The problem is NAS boxes (and this player is one) have small embedded CPUs that are running an OS, user interface, and network interface at the same time. You’ll max out that little CPU long before the HDD or network is the bottleneck.
The ethernet speeds are similar to a lower-end NAS and that’s expected. Think about it this way, WD picked a mix of hardware and software to make the experience usable for most people as a network player. It isn’t a PS3, XBOX, or home-grown media center PC and nor is it priced that way. It’s small, quiet, low (electrical) power, integrates well many TV setups so it satisfies most player needs without too much hassle. If you need a higher-end setup, go for it.
What a lot of techie people lose sight of is that most products are made for the masses, not for the over-clocking crowd :dizzy_face: IMO, the hub seems to be about right for many but not all people.