I very rarely even take a gravity reading until about a week and a half, which leaves a couple days to take another and then into bottles if it's ready at two. If it needs longer it stays in the primary. The only time I ever use secondaries is if I need to for some reason be it dry hopping, lagering, or in attempts to rouse lazy yeast.
Even after activity stops, there are still good things happening in there. Let it sit. My vote is a minimum of two weeks in the primary...every time.
Primary: Coffee Brown
Secondary: Constellation IPA
Lagering: meBohPils 3
Kegged: meRobust Porter 2
Bottled: Sammy Smith Nut Brown Kinda Clone
Bottled: mePumpkin 2012