NICE times man! Thats definatly VERY rare, but it happens.
I just wish I could come off the line like that! But mines my DD and I must come out easy...no powershifting either. Oh and Im not so sure you will MPH higher with Drs....because you wont be able to hook and transfer all that energy from a high RPM launch into forward motion. My car ALWAYS looses MPH when I spin or cant come out hard due to prep or tires. N/A and now turbocharged.
Contrary to popular believe, Vettes actually launch very well even on the stock suspension and being IRS.
[On that night video pass, I drove to work on the etstreets went directly to the track in scrubs, aired the tires down, took one pass as a good stress relief, aired them up and drove home.]lol
I almost always pick up mph with drag radials about (1mph) and lose et (about .1-.2). You really shouldn't lose mph when you spin unless you bog after the spin. Maybe we can figure out what's happening on your launches?
Since the goal is ET I haven't run my current setup with drag radials.
On my car with low torque they tend to want to wheelhop also which we all know kills parts. The auto guys have much better success with drag radials on vettes at least.