For whatever it's worth, I have an anecdote regarding safety in station wagons vs. SUVs. When I was young my little sister was almost killed in a car accident because she was in the back seat of a station wagon when they were rear-ended by an SUV. SUVs don't have the same bumper level that other cars do, so instead of impacting the designed crumple zone, the SUV rolled up into the back window of the station wagon. Another foot and she would have been decapitated.

Subsequently, I've seen a couple sources which corroborate this trend -- in high speed accidents between cars and SUVs the fatality rates where higher than two cars.