Guys, you check every chapter to try pushing some false equivalence but it's the first time Oda has Luffy react to how powerful someone presence is in surprise (not going to troll and push the scared thing) as a cliffhanger.
This is not Luffy giving someone a compliment after he performed some cool feat , it's Luffy's
instinctively reacting from the raw power of someone he doesn't even have visual contact with.
On top of that, it happens after Wano where Luffy supposedly fought and surpassed the peak of power in the verse.