definately better than 08
the bugs i can see that were fixed were
1. you can finish replays
2. when you get into another car he will get loose and depending how hard you hit him he will spin sometimes, not like in 08 where the AI drivers were like tanks and the only way to wreck them was to t-bone them at 160 mph taking you and him out.
i also like how the engine in 09 sounds its more deep like it should be 08 sounded like a weed whacker / honda civic.
the thing that sucks is the AI isnt as agressive as i would like.