I think that an L/900 designed structure will still fail in a hurricane if it is subject to the sort of domino failures that destroy most buildings in such storms; a wind driven projectile penetrates a window, shutter or sheathing and lets wind and water into the building. The resultant wind lift on internal floors and walls causes failures of the framing connections. Consider that a 100 MPH wind represents a force of 25 lb/sqft. and that this force grows as the square of the wind velocity and you can see how wind can destroy about anything if it gets in the wrong place.

In other words, I think that storm resistance is a complicated equation of structural strengths and frame stiffness is only one of them.