I was T-Boned by a lifted Chevy K3500 going 50mph in my old Lincoln Mark VIII. What saved me was the design of the body. In that car, I was sitting essentially directly next to the B-pillar (I'm tall), and the doors were 10 inches thick in some sections, and very structural, being a 2-door coupe with very long doors.
Being a unibody coupe, the B-Pillar was very strong as well.
I had small cuts from the glass (driver's window, and moonroof) shattering all over me, but was otherwise uninjured. My neck, knees, and elbows took their turns alternating between feeling fine, stiff, or hurting like an inglorious b###tard for 2 weeks. I was able to remove myself from the car before EMS arrived.
I was downright amazed at how much of an impact that shell took. That car had no side-impact airbags. It was just put together well, like my no-airbag BMW that allowed me to walk away uninjured from an accident that left the transmission rammed into the back seat.