No one is saying that Apple is using the PoE standard for this as it wouldn't make any sense at all. What we are saying is that Apple is using a cable transporting a low-voltage direct current, most likely no more than 24V, to also transport the Ethernet signal over. The high-voltage side is completely isolated from the low-voltage side on that power supply meaning that there isn't giong to be any AC interference at all (which is, as you should know if you really know your Volts from your Amps, much more intense and requires much thicker shielding). This isn't new and groundbreaking technology but has been done before time and again, see PoE. What
@Allyance and I are saying is that there is no loss of performance, increase in jitter, or increase in latency in PoE connections either. They are capable of transporting 57V/1.75A combined with a clear and jitter-free 1 Gbit/s Ethernet signal over a simple unmodified CAT5 cable using two twisted pairs of copper intermingled with the remaining two twisted pairs of copper used for data to transport the low-voltage direct current.
The ethernet port on the power supply is really a non-issue.