Bonuses for above-and-beyond stuff (ie not the "bonuses" that everyone counts on) tend to vary wildly in my experience. I've gotten a very similar bonus to thi

Bonuses for above-and-beyond stuff (ie not the "bonuses" that everyone counts on) tend to vary wildly in my experience. I've gotten a very similar bonus to this for putting in a few long nights and accelerating a client delivery by a month. And sometimes much less for much more effort. I think it depends on how much of a slush fund a project has, which might not be at all tied to the impact of the project.