We've shipped over 200 client engagements on a strict two-week sprint cadence. Not three weeks. Not one. Two. The discipline behind that number is the single biggest reason our retention rate sits north of 90%.
Why two weeks, specifically
One week is too short for meaningful scope; teams burn the cycle on planning overhead. Three weeks is too long; stakeholders lose context and surprises compound.
Demos, not status reports
Every sprint ends with a 30-minute live demo to the client. No slides. No status updates. Just the working software.