the vertical component and Vne is 236kts--the PC12 is not a slippery speedster. I'm assuming this plane did not arrive at the ground in one piece.
I was thinking the same thing. The Youtube image of the fuselage on the ground behind the emergency vehicle, with the cabin door open, does not look like an airplane which sustained that rate of descent....
But then it doesn't look like a helicopter either....
5-dead-after-careflight-helicopter-crashes-near-stagecoach