If anyone you know has doubts about the response time on Stadia, just have them play Thumper. (Also first 100% achievements in a game!) : r/Stadia
Stadia Pro Members Getting Rise Of The Tomb Raider & Thumper To Start 2020 - mxdwn Games
January's Free Stadia Pro Games Include Another Tomb Raider Title and Thumper
The developer behind the fast twitchy game Thumper, just tweeted that " Thumper plays great on Stadia" I'm convinced latency is no issue on Stadia : r/Stadia