It all depends on how the car is set up. I believe my car is far from laggy and very streetable. I see 15psi in first gear. I see full boost in 2nd gear, and reach full boost about 4700rpm. I rev to 9000, so I have over 4000rpm of peak power. The standard H series TD06’s seem laggier and make 100+rwhp less than the TD06L2 turbo’s on my car. I don’t think any Z owner in the US can complain about lag. Have you ever driven in a supra with a GT47-80 on the stock 3liter? Now THAT is laggy!