Apparently I need to ride an Antler cause that is not remotely the impression Burton gives not what it's tech or position in the line suggests.
You should go for a spin. I own a Sherlock, and demo'd an antler, definitely softer, at least last year. Had a long conversation with an instructor on my local hill, his view was that his Antler was a very flexible board, matched my impression. So between my own demo and that conversation I say it's a pretty soft board.
It's a bit strange, all that carbon means a lot of potential for a light stiff board but it's a high tech board that's not oriented towards stiffness.