Weirdly my Satori is one of my strains that seems to take at least 6-8 weeks to show. I do not believe I have ever had any plant show sooner than about 5 weeks. I do think it is mostly strain related though. If you give plants a long veg period, the time is less important than if you are one who flowers a lot of small plants--i.e. putting clones into 12/12 while they are small.
If you are starting with unrooted cuttings, the time frame will be about the same between seeds and clones. If you are buying rooted clones, you have at least a 2 week head start over seeds.