https://streamable.com/xg2du h/t @willcross For the full interview, check out his thread: https://www.boxingforum24.com/threads/ali-makes-funny-modernist-arguement.625846/
Not much to say, Ali is just straightup wrong. Louis was efficient. He crept slowly towards his opponent to measure distant and prepare. When he needed too he could explode with his feet. Ali also GROSSLY exaggerated when mimicking Louis's punching. Louis's hands are as fast as Ali's feet, but Ali acted like Louis had the handspeed of Valuev Conn was good but not his best opponent, that honor goes to either Walcott or Schmeling. Walcott has better footwork than Ali IMO, and Conn is faster than Ali, though Ali is more range-y. Ali, at this point, was critiquing Louis in a glass house, considering his resume consisted of 1 good win against Liston, and shot Williams, a 45 y/o Moore and Patterson, who had been demolished by Liston not too long ago.
I don't see how "efficient" and "slow" are inconsistent. Call it what you want, but Louis had a hard time keeping up with and cutting off the ring against some of his more mobile opponents. Louis could definitely put together combinations faster than Ali does in that clip, but he threw plenty of slower, more tentative punches too, especially when his opponents weren't standing flat-footed. The big difference between Ali and guys like Walcott and Conn is that Ali could control fights and do damage from outside of his opponents' punching range. For all his footspeed, Conn did most of his damage to Louis at very close range. And for all his cute footwork, Walcott's offense was based on him planting his feet and throwing bombs from mid- and close-range. That makes Ali a far more elusive target overall.