Very nice. That was some impressive shifting. Reminds me of myself. The hole shot looked good, a little shacky, but you got out. Like I said before the shifting is top notch. Your trap speed seems to be a bit low, however this is probably do to the larger tires and nice launch. I agree with you 100% on there are too many people who dump too much power into their cars, when the vehicle itself is not set up for the power yet, and or they lack the driver mod. There are plenty of stock cars that can be very quick, if launched properly. I have seen LS1 TransAms and Camaros, as well as Corvettes, that put 30+ more rear wheel horsepower and torque than you, yet cannot muster the times you presented. Rule of them is, you should try to get the power to the ground first, then work from there.
Great run with that healthy, stockish Z28. She's a beauty.