Valkaneer, you're right about the ways haste helps, but you've got some of the details of its effects wrongs:
Sword and Board gives Devastate crits a 50% chance to reset SS. That's generally going to come out to less than 30% overall. Marok also said he was ignoring resets in his calculations.
They're affected by haste at the same rate as the GCD. You get to use SS and Revenge more often because haste reduces their cooldowns, but there's no, like, double benefit.
Marok's calculations are right - with 50% haste you'll get about 8 extra IP casts on top of the 16 you were getting from rotational rage with 0% haste.