My experience with TACC in city driving is that it doesn't reduce its speed gradually (like a human would) when approaching stopped cars at an intersection ahead, but flies onward at full speed, then applies the brakes aggressively to come to a stop, and then stops farther away from the vehicle ahead than a human driver normally would (I think the rule of thumb is: the bottom of the rear tires of the car in front are at the level with the top of the dashboard from the driver's point of view); it does start up more quickly from a dead stop following the car ahead than did v.9, but does so too abruptly--again not easing into the acceleration like a human would, but accelerating abruptly; but then it does pick up speed more quickly than before, which is good.
It still does not react in a human-driver way to cars that are turning to the right from in front of it, braking so aggressively (even after the other car is no longer in the street) that it becomes dangerous to anyone following me. Same thing goes for cars crossing in front of it, or even turning left; the car practically stops, then accelerates very slowly--endangering and irritating anyone who is following behind. I love the idea of using TACC in the city, but it definitely is not yet ready for prime-time.