I used to live in Redondo Beach next to Palos Verde where Tiger wrecked. At the time I had a 70 Cutlass that I just had the motor redone in and I had a Porsche Carrera. I used to love to rip them up and down the hills in PV. Twisty steep 2 lane roads intersect that hill. I had my fun but used some common sense and never wrecked like Tiger. I am sure he was just having some fun hot rodding his suv and lost control.
Traffic video of his SUV shows he was following a minivan and was not speeding.
More likely is that he took his eyes off the road for a couple of seconds, then collided with the island.
Absence of skid marks and the heavy damage tells me that he mistakenly stepped on the gas instead of the brake and accelerated into the side of the hill.