I agree, GT5 is no where near as realistic as Shift 2.
It's refreshing in Shift 2 to actually wreck when you know, wreck, and not just bounce of cars and walls like a pinball.
It's refreshing to have adaptive competition that no matter what car you're driving actually gives you a competitive race.
It's refreshing to have AI that actually knows you're out there rather than making laps like slot cars.
It's refreshing to have a car that actually makes you feel like you're driving fast, rather than just making you feel like you're going to puke because the cockpit shakes.
It's refreshing to have FFB that actually makes it feel like you're losing traction and your car is loose
It's refreshing to have a game that actually sounds like you're driving a car on a race track, with marbles under your car, dirt and rubber and grass coming from the car in front of you, stuff hitting your windshield, and FFB that gives you a different feel from what surface you're driving on.
And it's really refreshing to have your car get damaged when you roll over, crash into cars and walls, and you're engine letting go if you over rev, rather than being indestructible Hot Wheels that bounce like pinballs with no damage off of everything they hit....