Because someone once theorized the same (without any evidence by the way) and the clueless ran with it like it was gospel. Sort of like an urban legend. It has been repeated so often on this board that is has become the "truth."
Twin tube came and went. Some Rads had it, some didn't. Not sure you would be able to consistently tell the difference between the haves and have nots all else equal.
Anyway, enjoy your racket and don't concern yourself with all this silly marketing nonsense.
Last edited by Fearsome Forehand : 01-28-2013 at 11:23 AM.