The engines: does the damage on the leading edge of the right wing mean they ripped off upon impact (reef close to surface explaining it)?
The photos linked from one of the early posts, taken shortly after the event, appear to show that at least one, if not both, pylons and engines have detached from the wing. All will no doubt be revealed when they lift the wreck out of the water.
Whether they hit the reef or not is probably academic - hitting the water alone, at that speed, would be like hitting concrete.
Same thing happened to one of the engines on the Hudson A320, it ended up on the river bed.