Finally I had a chance to try demo with dfgt. First the ffb had to be adjusted, I ended up with settings: simulation, power steering on and 7.
Had only 13-15 laps in stock 370z and ended up with 1:50:1 and after 5 laps in tuned 1:38:9. Also done some drifting in stock and race version.
First of all, I think the graphics were absolutely awesome. On screenshots it didn't look so smooth, audiences didn't look good as sprites, trees seemed shit, but when driving it all blends in an awesome way. It's best looking racer there is definitely.
Now the ffb.. It is good, especially after turning on powersteering, as it improved countersteering, but still somethings is wrong. Something during drifting, the ffb doesn't aid you the way it should exactly. In real life you don't really think how far will the wheel countersteer when you let it spin or throw it. In GT5TT I had to be very careful when countersteering. Over all I had to be "on my toes" to not spin out when drifting. But the way drift ended sometimes and the way I could exit the corner with power on - it felt nice. It's just as I've said - sometimes it felt nice, but sometimes it bited for reasons I can't explain.
In stock 370z:
Low speed physics definitely were improved, which I am very happy about. I could do circles and 8 figures in second gear, could do some 2nd gear swinging too. Also the sequence of 3 corners at the end could be linked in a drift. It felt pretty good, but it often definitely was too snappy and not stable enough. It almost felt like sometimes something happend in a scripted way, and sometimes it felt realistic.
During racing slides could be controlled nicely. But sometimes things were getting out of control quite weirdly.
Race 370z:
It was super fun to drive it, I could feel the tires nicely and suprisingly the tires were more forgiving after the limit than street tires in stock version. I never drove with slick tires in real life as a driver in a car so I won't comment on that.
Sound:
In my opinion engine sounds were really nice. Tire sound were okay too, but they didn't give much feedback. Tires were making too much noise when they shouldn't and too little when they should. Rather than giving feedback, I felt they were making things only harder.
Also I didn't like the feel of understeer. It just feels off.
Going back to the good things, suspension movement gives very good immersion while driving, I liked it a lot.
To sum it up,
+ very good graphics
+ nice sounds
+ good physics, which I feel can be improved and I hoped they will be for the full version.
+ fun factor, addicting
- understeer feels off
- tire sounds give wrong feedback
- physics over the limit especially during drifting often feel wrong and too unforgiving
- tires feel bit too much like a solid material and not like tires.
If physics and ffb will be improved in full version of gran turismo 5, then I think I will buy myself a ps3 + GT5.