Yes, don't know what was going wrong for you, with me everything was fine till you selected play, then there was a message saying there was a problem with Netflix. T reset the Apple TV and that seemed to sort things.
Yes I've experienced problems on the ATV3 but not on my iPad. The ATV3 is wired into the router, so you would expect the service to be better, but it's not.
The problem is this: The feed gets really pixilated and blurry for a minute or so. When it goes back to HD, the audio feed jumps back about 5 seconds, repeating 5 seconds of audio and then stays unsynced with the video.
It's the strangest thing.
I have Comcast in a Boston suburb, but again, not having any problems on the iPad, so it's probably not Comcast.