Our evacuation checklist has the call to evacuate as step 5. That takes about 15-20 seconds after stopping. There is no 30 delay between selecting fire bottles during an evacuation.
If they had evacuated, and met the evacuate time criteria, everyone would have been off before the fire was under control.
The camera shows about 5'-10' of wing outboard of the engine.
The fire was at least 3 minutes based on the exterior video.