@KatSLF
Just to remind you that there was known to be at least one passenger from the Lockerbie disaster who was for a short period both alive and conscious after they had impacted the ground.
Typically it would take between 30 seconds and 1 minute for those passengers not incapacitated in the accident but ejected from the a/c to loose consciousness though lack of oxygen at that altitude. Whether many would regain consciousness as the oxygen levels increased on the way down is another question.
I would also expect windblast type injuries to abound to arms and legs as they would not have been falling like a trained parachutist would.