IIRC there was only one instance where Xuanming Divine Palms behaved impressively - namely striking down Yang Xiao and Wei Yixiao with 20% of poison left. But there were more instances where it wasn't as impressive, such as not being able to take out the Merit-Rewarding Elder of the Beggar Clan quickly, and IIRC *both* XM Elders couldn't take out ZZR in the last chapter within about 30 stances. Also it was said that XM Elders couldn't defeat Fan Yao within 100 stances. I think they are usually overrated based on the YX/WYX incident.