Gemini 3.5 Flash's GA4 analysis achieves five-second precision: first user at 9:59:56, second at 10:00:20, cart additions at 10:13 AM, peak five active users during CP3, roll-off to zero by 10:58 AM. Temporal precision enables correlation with CP timing and role absorption latency. GA4 as stopwatch: tracking exactly when coordination events draw attention.