No it really want, go watch it again. It was messy and average. Yes I agree that for a Floyd fight it was exciting but compared to most other fighters it was average. Molina vs Provodnikov had at least 6 better rounds than round 4 of that fight. https://www.youtube.com/watch?v=uM7YzBCKHa0
It's all subjective. And if it's the greatest round of all time for you, than that's what it is. I'm not the biggest floyd fan, but that happens to be my favourite mayweather fight. In retrospect, it was good to be a boxing fan in that era.