I read that 03 and up had a different transmission. something abut GM making the 03 and prior transmissions.
as far as shifting in a straight line from a take off its quick. Downshifting for twisties doesnt have to much lagg. For example if i go from 5th to 2nd it doesnt take more then a second after i pull the gear shift down 3 times quickly.
if i am up shifting though it will lagg a little. but not for downshifting.
btw i have driven the z. as mullet said..straight track car feeling.
We all get the urge...Saturday early morning...nothing to do till noon...
The aural sensations of 1st gear WOT
**CGM **(Certified Garage Mechanic)