Have you tried turning on/off the improved transaction translator
scheduling or turbo_mode in the network driver?
I have not, but given that performance is increased by *any* other usb
activity (storage, mouse, ttyUSB0), I doubt the ethernet driver itself
is at fault.
> both 14.7 each (29.4 total)
> both+ping 14.0 each (28.0 total)