After the recent minor update, Grid Start behaviour was changed slightly for the better. Although optimistic at first, I now find that my win ratio in this mode is only marginally better than before. I estimate I can win maybe 1 in 10 races. Starting from P6 inevitably sees me surrounded by bots who all make contact with me resulting in multiple engine slowing penalties, thus undoing any good that came from being faster off the line. I then find myself again at the back of the pack without the necessary speed to catch the other cars.
Here's an example grid win that includes AI examples with:
multiple AI induced collisions with no slow down,
dive bombing corners 4 wheels off,
Sector 3 time warp on a record lap:
Opponent is @ 1:13 sector start and 0.53 at the finish line, which is only 20 seconds faster.
Game show opponent 1:03 faster Sector 3...
Noticed a couple of things the first time while watching replay:
You can see the rear wing of other cars flip during braking - cool 😎
The mirrors are set for parking the car, change the angle and they could become useful see a car next to you, at least on tablet devices.