Micro USB to ethernet/rj45 topic

Hi all,

I would like to ask if anyone has ever tried-used a micro usb to ethernet adapter, that could actually work in 100Mb/s.
The majority of these adapters cannot work in more than 10Mb/s even if they say 100. Maybe they work in 100Mb/s Half duplex.

I have found some reviews with adapters that perform in high speeds, but they don't write which chipset the adapter use.
http://youtu.be/LCXvfz41yv8


Thanks in advance.