Originally Posted by |MaguS|
How can you tell if something is laggy by watching a video?
When talking about game performance, "Laggy" means that the display doesn't immediately respond to your input because the frame rate is too low (if you press a button between frames, it has to wait till the next frame to show what happened).
Besides, that video was probably compressed to 24fps and interpolated to fit YouTube standards. This can't be done in real time, and it doesn't solve the problem of input lag.
Still, I haven't played Split Second, so I can't comment on the performance of this game. Without a demo, I won't be playing it though, because I generally do not like the look or the feel of games played at 30fps.