Have you seen Mustangs that run 10's? Tires are in the air.
Launching isn't about stressing the driveline. It is about efficently getting the maximum push going forward.
Here is some info you will probably enjoy: http://www.baselinesuspensions.com Check the "Launching a Drag Car" page. Good info there. Kevin Slaby is a very knowledgeable.

Again, the engine is producing the same torque and stress on the driveline from either engine when at the same output level. It doesn'nt matter whether the engine internally has oscillating pistons or spinning rotors. It doesn't matter if the engine spins a crankshaft or an eccentric shaft. The bottom line is if the engine is putting out 330tq, it's putting out 330tq. 330tq is not more force coming out of one motor because it's a different engine type. There is no denying simple physics, or common sense. So a piston motor at 500hp is not easier on the driveline than a 300hp rotary - because the horsepower has nothing to do with it. The torque is what breaks and twist things.

BTW - I am very familiar with Grannys. A friend of mine has a 2nd gen vert with a 302 that I have spent some time on. And you are right that the TII driveline holds up pretty well. He has TII driveline, and takes it to the track occasionally, but he is only pushing about 350rwhp.

As for V8s - I have a supercharged 302. It's slow. Don't think that all V8s are fast.
I also have had many Rx7s and have a FD right now. It's slow also. But exactly as fast as the V8, but with less hp and tq. It is more fun though.

If you want to see a mid 10's run with no launch - watch any Supra at the track. Sorry, I couldn't resist. :-)