We just call that a kick-out. We do that here on high-end stuff as well, because people like the look of those very steep roofs, but you need some overhang to put in the soffit vents so we scab on a shallower pitch as you describe. I thinks it's really interesting to hear about different framing techniques used in other parts of the country. I think ti all depends on how much the builder is willing to pay and how fast they want it done.
The method used here is easily laid out with a carpenter's square and since most builder's pay a bonus for speed, production homes can get framed in less than 3 weeks!! I wouldn't want to live in one, but that's how face they get thrown up around here. Even though they're my bread & butter right now, we have always referred to them as future tear-downs.