in my opinion they wanted to point out that Gigabit Ethernet has no concept of a Multiaccess network with CSMA/CD like the original Ethernet specification (implemented in hubs). There will be no collisions on a GE link as it is always full duplex. GE works like a Layer2 point-to-ponit link between two devices.
GigabitEthernet has indeed a concept of multiaccess network.. There are many problems running in half-duplex mode so the CSMA/CD protocol was enhanced to allow for GigabitEthernet to function...
The preferred method is without a doubt to run in Full-Duplex mode then viewing the link as a 'poin-to-point' link and this also the 'standard by practice', which I also think is the meaning of the original statement as you also pointed out..
Firstly I just want to point out that "point-to-point" doesn't mean anything else than there is ONE sender and ONE receiver.. or.. there is ONE connection between TWO devices... and remember that GigabitEthernet physical and data link specification, while PPP (as you may be thinking of) is a data link and partly network specification.
