Sounds like the media aren't the only ones who are ignorant as to the where the B787 fits into the Boeing 'size' basket (Goddamslacker);
B763 v B788 = 54.9m v 56.7m (I assume you're referring to length as blind-freddy can tell there's no confusion as to width and wingspan...).
As for those wondering about the relative sizes of the JQ widebody fleet, the A332 is 58.8m in length. Airbus fuselage width is 5.64m and that of the B788 is 5.77m - yet they squeeze 10% more punters into the newbie! Ouch!