I think that blindly following the 1,2,3 process is akin to putting a turkey in the oven, the recipe calls for say 350° for 4 hours, and you pull it out of the oven without knowing if it is overcooked or undercooked. leave the beer in primary until the gravity is constant for several days in a row and then let it sit for another week to let the yeast clean up any off-flavors that they produced during fermentation, it also gives them a chance to drop out of suspension and to create a nice compact cake that is easier to rack off of.
give this
thread a read if you get a chance, you leave the beer on the yeast cake for a week, this guy went a bit longer...