In regards to rubberbanding, I think the AI will travel at less than its absolute potential if you're going exceptionally slow, but will ramp up its speed until it reaches peak performance as you cut your way through the pack and then attempt to build a lead. However, I haven't seen anything to indicate the AI can do anything more than 100%. If I'm doing consistent laps I have no problem building a lead, but if I screw up and lose something like 3/10s in a corner, that time is reflected in the position of the AI. The thing that throws people off I think is the exaggerated drafting ability and the stark contrast between different vehicles where acceleration, top speed, braking ability, and not just grip, but the balance of that grip (i.e., understeer, oversteer, or neutral) are concerned. People tend to forget that high entry speeds plus drifting are not usually conducive to a quick exit. Even though the cars have an enormous amount of grip compared to what you would find in real life, you still have to abide by some of the rules of spirited driving (out-in-out, entry speed vs. exit, early and late apex style, etc.) to get the most of out your vehicle's performance. From what I've seen online and in videos,
a lot of people are messy and not quite as capable as they seem to think they are. The best piece of advice I can offer is to record your races and time trials and then watch them later with a critical eye. You'd be amazed at how many errors you can spot in what seemed like the perfect lap in the heat of the moment.
I gotta say, even though I'm not gonna throw a hissy fit and go selling the game as some kind of demonstration, I'm getting pretty sick of not even being able to size up a leaderboard before a track even loads. It used to be so snappy, considering how short load times are, showing you what the top times for this particular track with this particular vehicle class.
That plus no face offs or random ghosts to chase around the track... Fuck. It's a whole other game without it.
It seems like certain features are either slow to load or are out for lunch on certain days. I just chalk it up to diagnostic troubleshooting and go about my day. It's annoying (especially since the game feels so much more alive with everything working), but at this point there's nothing I can do short of calling Sony and asking for a refund. As I'm hopelessly addicted to the driving and track design, that just isn't a realistic option for me.