In reply to Alan.T: No, it means the rope teams were pitching it. Hence my comment that I would not to that if it was remotely possible to avoid it - move together continuously.
I would never have more than 1 ice-screw on the rope at any one time, or it is too slow. I find one ice-screw doesn't really slow you up as it gives a bit of a rest anyway. Second gets to the ice-screw, calls out,clears the ice, leader places next screw, when the leader has used all 3 ice-screws, they take a "belay" with both axes planted firmly and the second just goes through with the clean ice-screws and repeats the cycle.
All assumes that the bergschrund is straightforward, which I would think that it currently is, indeed the account said "bergschrund? what bergschrund?", though it is hard to see how this is relevant to the Nadelgrat (presumably done from the Bordier hut, judging by the account).
So weather and the other mountain Gods allowing, it should be perfectly do-able.