1. 2-2.5 seconds. Trigger speed ontrail cams is over-rated. Proper setup can compensate for trigger speed, I have never set a cam perpendicular to a trail anyway.
2. flash range is 35-40 feet. Yeti board can sense movement far beyond that, probably up to 80 90 feet.
3. delay can be set to 15s, 30s, 60, 1m, 2m, 5m, 10m