They asked Canelo who was the most devastating puncher he ever faced and he said Kirkland surprisingly. Yeah he was slow as molasses.
Arturo Gatti imo was slow for a guy that came up from the lower weight classes. Mayweather and DLH made him look in slow motion. But man he had a powerful left hook specially to the body.
Gatti's career formula: Struggled against A and A+ fighters. Went to war with A- & B+ fighters. Won some lost some. Anything less than a B- fighter, he'd put them in a hospital bed.
I'd rewrite that. He got battered against A+ fighters Lost to Cs and B-s. Struggled with C-s. Destroyed Granada's. Tried to war with all of them.