I think it's already beginning to subside. The MacRumors editors took the weekend off, rather than stay and post new articles hourly.I have a feeling this controversy will continue to rapidly expand before (or if) it subsides.
The more iPhone 6's are out there in regular users' hands, and the more they find that the phones are not particularly bendy, the less traction this will have.
What could keep it going is a lot of actual iPhone 6 owners showing up at Apple, needing their phones replaced. Such an occurrence would be convincing to both Apple and Bendgazi skeptics like me, that engineering changes were warranted. YouTube videos aren't convincing when real-world evidence doesn't show a problem.
As an owner of an iPhone 6+ that has survived my pocket for over a week without bending, I'm thinking that rush is going to be a tiny trickle.
The issue will never completely go away. There are always a few in every crowd who will keep bringing it up. But they will have to compete with the growing reality of actual iPhone 6 owners who aren't experiencing the problem at all.