Why you're lying to us?
There is Marvell 88E6341 (6port) switch inside so it's not repeater, it's 2-port switch. And it's using store&forward so it add some delay (like any other switch).
going back to the basics of networks:
what is a hub? is a multiport repeater, because that it can only work in half duplex, for obvious reasons
its a fact you can't do
repeating in a full duplex gigabit ethernet segment, you have to do switching
i think its obvious gper is a switch because of the extended reach only achievable electrically regenerating the signal
this topic has become a very Byzantine discussion
a lot of questioning and criticisms for a 15 USD device you have not tried
i have tried it and works well, its a very useful and innovative device, its a matter of time to see it allow diverse and innovative solutions and designs
with the new GPeR IP67 Case, the possibilities are endless !!!
i think Mikrotik do a Good job whit this kind of disruptive devices, maybe too disruptive to be properly understood by some people