If I'm reading this right, AI was a disappointing highlight ... at an event explicitly organized to give AI a shot at being anything other than a disappointment.
A less generous reading could be that the event organizers just didn't know any better than to expect AI co-authored papers to be largely slop.
But to me this reads like an event organized explicitly to see how AI performs when it isn't laughed out of the room during pre-conference checks.
That's a pretty interesting event.
It is not an incredibly shocking outcome, but science marches forward. Water is still wet, and computers are still stupid in secret fundamental disappointing ways.