A few thoughts on the AI. First, it is vastly better than GT5. Cars race each other. Cars race you. If you overcook a corner passing them, they will retake the position by cutting underneath you. They aren't perfect though, they will drop off at times like GT5 rather than trying to keep up with you and are often way to slow especially at the beginning. Their defensive moves are sometimes bad enough to be blocking or actually take you out. They will sometimes try to push you off track. There is some definite rubber banding going on. If you take a very overpowered car and take the lead early, the AI tends to drive in a line close to each other with maybe one or two rabbits that are a little faster. If you crash or are slow, they appear to space themselves out more giving you a chance to pass some cars. The lead car tends to keep a relative constant distance until later in the race then allows you to catch up, then goes faster again once you've passed. I wiped out on the final lap after just passing the AI, the AI was kind enough to slow down again to allow me to catch up. On the plus side, the rubber banding makes for more fun races when you are trying to learn a track. If you wipe out, you still aren't out of the race. On the minus side, you can't have a really competitive race; you don't know if you win a race because the AI lets you are because you were fast. I'm not sure if the AI genuinely lacks overall pace or if most of the AI's characteristics are mostly decisions PD made to make the game fun for most people.
