What you seen was set up for that driving game and seemed exaggerated in it's movements.
Not really, formula 1 cars easily exceeds 1G during acceleration and braking.
For this thing to give the sensation of 1G acceleration, it has to point straight up - or straight down for 1G braking.
(and still its a far shot from reality, where the acceleration vector would be sqrt(1+1)=1.4 - in other words, pointing up or down, leaves nothing left to pull you down in seat)