I think it's safe to say any impact would have been severe and people would have died instantly.
If it was a controlled descent it would have taken quite some time to meet the water, would have been visible on radar and would likely to have time to get a call out.
This was a sudden, catastrophic failure resulting in a high energy impact with the water.
I would find the Twitter posts of people claiming victims have been found dead holding hands laughable if it were not such a tragedy.