Rainboe is on the money. What this 777-pilot does not mention is that a wing with two engines on it will flex a lot more under the same circumstances than one with only one. The fact that the crew didn't decrab might have to do with the lack of ground clearance of the upwind outer engine when such a maneuver would be performed, and with this in mind the crew elected to perform a touchdown with crab on, but wings level instead.
Good job I would say!