Huo Jianghe, Huang Tao, and Bamboo had fought with World's Edge back at the Ethereal Hall.
World's Edge's swordsmanship was like an enigma to them. It rendered them completely bewildered. They could tell that his swordsmanship was formidable, but they just weren't able to discern what was it about it that made it so formidable.
To put it in other words, they only knew of the result but not the causes behind it. As such, they weren't able to accurately interpret his strength, much less evaluate it.
But such was not the case for Dan Xiaotian. They could clearly see that every single strike he executed was aimed directly at Huo Jianghe's weakness, so Dan Xiaotian's strength was easy for them to comprehend.
In less than ten seconds, the twenty blows that were executed rendered Huo Jianghe unable to retaliate at all.
Even true inner disciples wouldn't have such sharp swordsmanship!