The response time depends on the quality of your home wifi, and maybe the exact router type. With a very good coverage you can set the away-delay to a much shorter period compared to a home with bad wifi. I have a r7800 as main router, and a r7000 on 2nd floor as additional access point.
I am however using a secret new version of the netgear app (
) that allows to set this delay time per device, in stead of one general setting. Because my tv is connected by wire I can set the delay time even to 0 seconds.
I’m testing this new version now, and will probably publish it as beta in the appstore 
