Yes I saw that on many racquets, but my question is : What on the racquet is 10mm long? Look near the cone. http://img69.imageshack.us/img69/5945/ns900030rr.jpg
Most new yonex rackets, especially the top end models, are 10 mm longer than the old generations. It's not really a special feature anymore. There are other brands that more than 10mm longer.
New racket is almost around 674 -675mm while the old one is around 664 -665mm ... so it shows 10mm long. The Max is 680mm ... this is offical rule.
Is there really a difference in performance between the lengths? Would longer shafts bend more, so even if it's stiff, you'd feel it to be more flexible than a shorter racket, with the same stiffness?
http://www.badmintoncentral.com/forums/showthread.php?t=4503&highlight=10mm+longer http://www.badmintoncentral.com/forums/showthread.php?t=5835&highlight=10mm+longer http://www.badmintoncentral.com/forums/showthread.php?t=7339&highlight=10mm+longer (Vote) http://www.badmintoncentral.com/forums/showthread.php?t=21968&highlight=10mm+longer http://www.badmintoncentral.com/forums/showthread.php?t=16035&highlight=10mm+longer