I'm not talking about numbers and charting, I'm talking about the marketing.
They've debuted with a 4 songs mini album, each song with an MV and Hype Boy had 4 MVs to introduce the members, they've also launched their own app and released an album with a bag.
We didn't have a month or two with just teasers pics, logo, member info, MBTI, etc, they announced they would drop something some day and when everyone expected the logo they dropped an MV of one of the 3 Title Tracks of their debut album, the next day the dropped the second MV that had 4 versions, and then they dropped an MV for their b-side. And finally, after one week, they've debuted with another title track and MV.
After this, I hope the new groups under the Big 4 debut like this, and I'm looking at you ygngg.