Me too, and to bring something into consideration:
cheftrd, you mentioned in one post in another thread that the bump-sticks on top fuel dragsters have their timing phased out of sync with the other lobes on the same cam because of the torsional forces applied at WOT off the line, causing the cam to twist violently in a instant.
I think this is the same thing that's happening to the crank right when the clutch grabs hold...
cranks, having offset crank pins, would make it hard for torsional forces to travel down the entirety of the crank and flatten out along the axis which it spins. Since the 6/rear pin area is closest to the clutch and has no where to transfer the load from the immediate grabbing of the disc... twisty = snappy.
That sounds like a believable reason to me.