Careful picking on the Yanks SK!
I would like to drive an STS equipped car some time just to see how it feels.
I do understand SK's point and I'm sure the turbo sizing is very important along with the total volume of the turbo system.
There are several things items that can reduce lag.... Cams, throttle body position, engine size, engine tuning, etc.
The STS is an add on turbo system. Most of the kits they sell go on V8's that have lot's of torque, so getting off the line without boost is not a problem.
How do you compare a Camaro to a GTR when the GTR costs over $100K more? (Plus the Camaro is way better looking!) (Not sure what the AU conversion cost is...)
Check out - www.camaroaustralia.com.au