"I also recall another post around the same time that indicated the Antec
ports were not capable of USB 2, only 1.1"

NO such thing as USB ports only being 1.1.
ALL usb ports can be 1.1 or 2.0 asa long as usb is set up right.
Antec ports are NOT just 1.1.
The problem with them sometines is the contacts not making contact .

Contacting Antec for "revised"port board is wrong.
If you contact them it for the same port board and that is all you will get.
There is no revised one.
Some people seem to think they changed something on the boards,not so as I
have four replacement ones and all four are the same.