What's up with Fred?

[Nem14]

Vettel says - "The speed was slow - maybe 150kph. Then he turned right into the wall. It looked strange."

Boullier says - ". . . the car wasn't particularly badly damaged . . ."

Then Alonso's manager says - "The crash was very hard,” he said. “We don’t have images but it was very hard . . . it was a serious impact."
“The car telemetry has stated that he was correcting from left to right. Fernando was hitting the brake and changing gears until the moment of impact.”

So how much slower than 150 kph does the telemetry say Fernando was going at impact?

McLaren has said - "(Alonso's) car ran wide at the entry to Turn 3 - which is a fast uphill right-hander - allowing it to run onto the Astroturf that lines the outside of the track."
A consequent loss of traction caused a degree of instability, spitting it back towards the inside of the circuit, where it regained traction and struck the wall side-on."

(Which also indicates the car likely slowed some amount before impact.)

"It was a significant lateral impact (how many g's is "significant"?), resulting in damage to the front upright and axle. After the initial impact, the car slid down the wall for about 15 seconds before coming to a halt.
All four wheels remained attached to the car,

but no damage was sustained by the bodywork or crash structure between the front and rear wheels.”

Is there an issue with the McLaren's cockpit surround?
Based on the information provided by McLaren and Alonso's manager, how is it Alonso's concussion is severe enough to warrant 3 nights in hospital.

Inquiring minds want to know, and what are we to think tomorrow if Alonso is not released from hospital?