No. I think it's poor because I've played games at 60ms lag, and toggled game mode on to 30 and compared the difference. I'm speaking from personal experience, not speculation.You think it's poor because of the number. But in reality it plays fine. I can ensure you because I play overwatch on it everyday on pc/tv.
I am no Sony fanboy. Like I said, I own both Sony and Sammy. My pick goes to the Sony for colors. It put lag may seem high for the Sony. But it plays fine and I am a fps gamer.
Hell, on my current tv, sometimes it auto switches to pc mode when I boot my pc because of the receiver. This mode has a 37 ms lag, I notice immediately in Overwatch and change it to game mode.