Horizontal speed is irrellevent unless you hit a brick wall. You will slowly bleed off that energy and you body will take type of decleration better as it will have little affect on your spine. Car accidents, Nascar especially, prove that rapid horizontal deceleration is not fatal. Falling accidents show how fragile your spine is and how even a 10' fall can easily be deadly.
I could write a long essay on why Cirrus training is crappy and use plenty of first hand stories. This guy was taught to hot start the airplane with the throttle wide open so the engine screams to life right to 2000rpm, he was taught to climb right at Vx, lean aggressively in the climb, just keep the cylinder head temps below 450* (anything above 380* is bad IMO), and to fly final, to the numbers at 90kts (ask Boni about the '03 SR22 he saw float halfway down the runway at GED while he was there). I have not even gotten past the most basic of airmanship yet, there was still a lot of instrument flying that he was taught very poorly, and the ADM he was taught was horrendous.
Alex.