Sorry to hear about this. I've dropped my N9 several times before without a scratch. The N9 is not tougher or more fragile than any other glass screened phone. It all depends on the point of impact. In your case it looks like it hit the lower right edge first and the cracks radiated from there. Replacing the screen may come up 40% of the whole phone.

Btw, a silicon casing may have saved you by absorbing the impact at the edge. Mine is always with casing.