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A little off topic but, I wonder if you take 2 GM tuned SS's one 5sp, one Auto. I wonder which one is quicker. I'm out on a limb, but I think the auto would have a slight edge.
General rule on nearly all cars with equal skill and conditions the Manual will always be faster.
The converter slip always loses a little time and eats up power. The direct connection of a clutch is hard for a auto to overcome.