Pretty mediocre performance. A little behind the Si in acceleration, a little further behind in handling/braking.
Not unexpected I suppose, but still a little disappointed.
I'm not so concerned with acceleration, but I wish the braking was better. Probably nothing aftermarket brake pads can't fix, but it's still annoying, along with the old Pilot MXM tires (instead of the newer Primacy MXM4).
I'm surprised at the comment on the steering: " I really like the steering: Friction free, just enough weight and good yaw reaction." The Civic's steering was bashed as sluggish, but it looks like the Acura people got the right balance this time.