I have recently bought a cheap USB 2.0 hub with integrated LAN adaptor (depicted below), which is based on the RD9700/QF9700 LAN chipset and which according to the item description should "support 100BaseT performance". Luckily the iMito MX1 detects it properly (currently running iMito_MX1_V411_130204).
However, while the USB hub actually delivers appropriate data rates the LAN adaptor does in fact only support USB 1.1 (USBview.exe shows "bcdUSB: 0x0110" indicating USB1.1) which limits its LAN performance to 6.7 MBit/s (net data rate) despite my switch indicates a 100MBit/s full duplex link.
What bothers me even more is that it causes my iMito MX1 to freeze once I transfer larger amounts of data. In contrast to that it works flawlessly on my PC, so I can rule out a hardware issue.
I wonder if this is a general problem of the driver for the RD9700/QF9700 chipset or its implementation on the iMito and if other LAN adaptors based on this chipset (like the blue one depicted in the attachment) are also affected or if it is somehow caused by the specific hardware design of this combined device.