Just back from QM2.
I attended the very interesting "Behind The Scenes Tour", during which we visited many interesting places, including the bridge. I think I heard a fellow passenger ask the watch officer about turbines, from what I understood it seems they have been used some time during the storm to help maintain 23 knots against facing winds, waves and current.
I haven't noticed any extra precautions, apart from requiring all passengers to clear the outside decks soon after leaving New York and subsenquently closing them off. But Captain Oprey gave us frequent updates on the situation on the public address system. Quite a few people were really worried and he did very well to reassure them.
The effects of Sandy were quite noticeable during the first night of the crossing (howling winds, creaking walls, considerable pitching) although honestly, we didn't suffer much because our cabin was located amidships (4092) - and Queen Mary 2 is such a fantastic seaboat.
Here are a few pictures taken as we hurriedly left New York on the afternoon of the 28th October, just before the rising water level would make it impossible to clear the Verrazzano bridge: