Actually, come to think of it, I did fly a DL767 from CAI to JFK on the week of the Iceland Volcano debacle a few years ago (my original *A flight on LH through MUC was definitely a no-go). I forgot how narrow they were. Though, I'd probably pick the 767 seats over the A330 seats. Ms. Tacostuff didn't think the A330 seats were as terrible as I did, so maybe my body is just shaped completely wrong for the seat.