just my experience but, someone rearended me in my 87' teg doin about 45 mph, wasn't lookin no brakes nothing, just bam.
back bumper was under the rear seat. drivers side seat broke the impact.
when both cars acctaully stopped moving and i realized what happened, i got out. told the lady what i thought of her dumb a$$ and called the cops... had a couple scratches from broken glass, thats it... so i'd say a teg is pretty safe from rear end collisions at least...