One thing you have to remember about Camrys is that the ECU adapts to your driving style, but it takes a couple of days before it's in tune with the way you drive.
If you want to take it to the drag strip, you need to punch it hard several times a day, every day, for several days before you go to the strip. This will SUBSTANTIALLY improve your throttle response and overall times.
If you drive like you're sane, the ECU won't give you the best possible throttle response.
Drive like a granny, it'll optimize for granny driving. Drive like a nutcase, and it'll go nuts with you.
Try it out. You will notice the difference in a matter of days.
The difference between "granny mode" and "nutcase mode" can be described (if you have the V6 motor) graphically:
CJ