Originally Posted by
graraps
I haven't been on AF C recently so can't remember their exact layout (plus for some reason I think last time I flew AF C may have been on a 737, so that's a fair while ago!!

), but on OK the middle seat is certainly shrunk to make the other 2 wider.
I was on 2 AF 320-family flights early last year and don't remember the seats as the stretchy configuration you find on BA and others. At any rate, I would not hesitate to state the hypothesis that the average european business traveller has much less girth than the average U.S. one.