Instead of power steering fluid, could it have been brake fluid?
I say this due to they state that there were no skid marks up until time of impact. If they are going fast and hit the brakes and there is no fluid then there is no skid mark. You would then resort to the E-brake but that really only helps on the rear wheels. (at least on your average family car)
So the driver is going fast, comes into a corner to hot and tries to brake but no brakes, he has no time to think so the last resort before the crash is to try the emergency brake to slow the vehicle down.
Also in racing it is taught to do "Straight Line Braking". If you are turning the car then the weight is transferred to which ever side is turning. So lets say you are turning left, then the weight of the car is moving right. If you brake, the weight of the car is moving forward. The best example is to get a folding chair and lean it right or left depending on how you are turning. Then lean it forward during the turn to simulate braking and you see how the weight transfers to the front "tires" and how easily it can then have the back end of the car come around. With a Porsche that has a tendency to get squirrely due to where the engine is and other factors, this above example might get exaggerated.
Why I am bringing this up is why there may have not been any steering input by the driver. He may have thought any steering input would have put the car into a much worse type of spin and believed hitting whatever might have been a better choice. This story could have really been about Paul Walker and Driver wrecking a $300,000 sports car and everyone could be all self righteous about the Hollywood rich folk just breaking up a beautiful car. Both Paul and the Driver are in the hospital and here are pictures of the ruined car. They get out in a couple of weeks with some scratches or broken bones or something and everyone forgets about it.
Unfortunately, after the initial impact which may have forced the two unconscious, the car ignites on fire from a source located at the front of the car. Is exotic Brake Fluid flammable? They wouldn't be using regular off the shelf Dot 3 brake fluid in an exotic race car. But the engine and all the hot stuff is in the back...if the brake fluid line bursts up front and spayed onto something hot it wasn't the engine.
So just my .10 cents worth of tinfoil for what happened here.