Yeah sorry that's just bullshit. Entirely bullshit. 30% stiffer than what?! If you want to talk about the steering stiffness of a fork, separate it into two parts:
1. The steerer tube itself
2. The crowns, stanchions, lowers and axle.
Now given that this new standard uses the same size diameter at the lower bearing race as the existing tapered standard (Frustum - 1 1/8" upper to 1.5" lower), the crown will be the same and therefore no stiffer, and unless the rest of the fork below the crown was changed (which it has no reason to be), the entirety of the fork other than the steerer tube will be no stiffer than an existing Frustum setup.
Now let's look at the steerer tube - to actually twist this tube alone, ie apply so much torsional load with your hands on your handlebars, any amount that even bears relevance to the amount of torsional deflection you find in the rest of the fork - which has no reason not to be identical to an existing standard - well it's not even worth considering because even a 1 1/8" steerer tube is IMMENSELY stiff in pure torsion. And now we have yet another standard that we don't actually need, making it harder to find stems, headsets, decreasing production volumes of all parts involved and thus increasing the costs of production and more importantly, storage/distribution costs.
So let's get off the "you're biased" bandwagon mr Giant Glorydays. Please don't bother accusing me of being anti-Giant or anti-mainstream, I'm just anti-stupid.