Hi, has anyone tried any of the USB 3.0 gBit adapters with his SP2? I've ran some tests with two different adapters, either connected directly to the usb port or on a USB 3.0 hub and iperf only shows transfer rates of around 300-350 Mbit (USB 2.0 has 400 mbit, minus the overhead results in such levels). The adapter shows up as USB 3.0 under devices. It's more than annoying since I've bought the Dock as well which has only 100 mBit ethernet (It's a mystery to me, who greenlighted this in 2013/14). I've already tried jumbo packets etc. No difference.