USB2.0 @ 480Mbps , is that so ...?
...not really. This is what I understand :-
USB2.0 does a "round-robin" query on its single channel to ensure a consistent, sustainable output of 12Mbps for every USB2.0 compliant device. If a USB1.1 type is detected, the 12Mbps will be stepped down to 1.5Mbps. It's doesn't matter if there are 8 or 1 device, the speed is still 12Mbps for USB2.0 and 1.5Mbps for USB1.1
So why USB2.0 = 480Mbps ?