Yes, I tried the beta. But it's simply impossible. Even a monitor with over 8ms input delay svcks for gaming. Good luck getting a home connection with ping anywhere near that low to ANY server.
I didn't notice any delay. Then again, as I can't tell any difference in the smoothness of a game between 60fps and 120fps, I doubt I could tell any difference between 2 and 8 millisecond input delay :shrug:
I am fine with a 30 - 40ms response time, which is probably why I am happy with OnLive