Throwing in another complaint. Poor streaming quality with Netflix on two separate units, an ATV2 on a wireless connection and an ATV3 on a wired connection, Comcast, 30 up, 5 down.
List of things I've tried:
Update both ATV's
Set Netflix Playback to High
Switch ATV2 from 5 to 2.4 network
Reset, multiple times
Unplug > 10sec, multiple times
Re-Set Wifi password both networks
Re-Set Modem and router
Nothing has worked. Spent an hour and three phone calls with Netflix, they said their engineers are looking into it, try back in a couple days if the problem isn't corrected.