Well I see all this 12mb/sec stuff - which indicates USB 1.1 --- BUT then I go to my May 2010 MacBook Pro-13" and that definitely is USB 2.0 and yup, everything says speed: 12 mb/sec on my 2010 MBP as well! --- so I do believe my eMac is USB 2.0 as it says on the specs-- Here's a copy of System Profiler info for the 3 USB Ports on the eMac.
Tomorrow I will see if the hama-guy replies. I will also try to connect the USB2-ethernet adapter to my MBP (that shouldn't cause a probem, should it?)-- and test the speeds.
USB Bus:
Host Controller Location: Built In USB
Host Controller Driver: AppleUSBOHCI
PCI Device ID: 0x0035
PCI Revision ID: 0x0043
PCI Vendor ID: 0x1033
Bus Number: 0x3b
USB-MAC Controller:
Product ID: 0x7832
Vendor ID: 0x9710 (Moschip Semiconductor Technology)
Version: 1.00
Serial Number: cd20434e
Speed: Up to 12 Mb/sec
Manufacturer: Moschip Semiconductor
Location ID: 0x3b100000
Current Available (mA): 500
Current Required (mA): 500
USB Bus:
Host Controller Location: Built In USB
Host Controller Driver: AppleUSBOHCI
PCI Device ID: 0x0035
PCI Revision ID: 0x0043
PCI Vendor ID: 0x1033
Bus Number: 0x1b
USB-PS/2 Optical Mouse:
Product ID: 0xc045
Vendor ID: 0x046d (Logitech Inc.)
Version: 27.20
Speed: Up to 1.5 Mb/sec
Manufacturer: Logitech
Location ID: 0x1b100000
Current Available (mA): 500
Current Required (mA): 98
USB Bus:
Host Controller Location: Built In USB
Host Controller Driver: AppleUSBOHCI
PCI Device ID: 0x003f
PCI Revision ID: 0x0000
PCI Vendor ID: 0x106b
Bus Number: 0x1a
Bluetooth USB Host Controller:
Product ID: 0x8204
Vendor ID: 0x05ac (Apple Inc.)
Version: 15.86
Speed: Up to 12 Mb/sec
Manufacturer: Apple Inc.
Location ID: 0x1a100000
Current Available (mA): 500
Current Required (mA): 100