So to answer your question, no, actually.
Torque delivery is more shaped by exhaust manifold design. A lot of people complain of losing torque with large diameter exhaust, but they usually installed a header at the same time.
Another thing to consider is the psychological aspect. People claim to "feel" lost torque with large diameter exhaust, but dyno charts often read otherwise.
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A big turbo stang and a big turbo truck.